Properties of the Number 4989

Four Thousand Nine Hundred Eighty-Nine

Basics

Value: 4988 → 4989 → 4990

Parity: odd

Prime: No

Previous Prime: 4987

Next Prime: 4993

Digit Sum: 30

Digital Root: 3

Palindrome: No

Factorization: 3 × 1663

Divisors: 1, 3, 1663, 4989

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1001101111101

Octal: 11575

Duodecimal: 2A79

Hexadecimal: 137d

Square: 24890121

Square Root: 70.63285354564121

Classification

Fibonacci: No

Bell Number: No

Factorial Number: No

Regular Number: No

Perfect Number: No

Special

Kaprekar Constant: No

Munchausen Constant: No

Armstrong Number: No

Kaprekar Number: No

Catalan Number: No

Vampire Number: No

Taxicab Number: No

Super Prime: No

Friedman Number: No

Fermat Number: No

Cullen Number: No

OEIS Sequences

Number of "ON" cells at n-th stage in simple 2-dimensional cellular automaton (same as A160410, but a(1) = 1, not 4). A160414

Lower triangular matrix T, read by rows, such that the row sums of Tⁿ form the n-dimensional partitions. A96651

Minimal number of people to give a 50% probability of having at least n coincident birthdays in one year. A14088

Wiener index of a benzenoid consisting of a spiral chain of n hexagons (s=1; see the Gutman et al. reference). A193391

T(n,k)=Number of nXk 0..1 arrays with no element equal to exactly three horizontal or vertical neighbors, with new values 0..1 introduced in row major order. A240636

Odd composites k such that for all divisor pairs (d, k/d), d <= k/d, it holds that k = A048720(k/d, A065621(d)). A391248

a(1) = 1; a(n) = 3 + n * ∑_k=1..n-1 a(k). A82428

a(n) = 6·n² + 10·n + 5. A201279

a(n) = least m such that if r and s in {1/2, 1/5, 1/8, ..., 1/(3n-1)} satisfy r < s, then r < k/m < (k+1)/m < s for some integer k. A24837

Semiprimes with strictly increasing product of digits. A246569