Properties of the Number 1679

One Thousand Six Hundred Seventy-Nine

Basics

Value: 1678 → 1679 → 1680

Parity: odd

Prime: No

Previous Prime: 1669

Next Prime: 1693

Digit Sum: 23

Digital Root: 5

Palindrome: No

Factorization: 23 × 73

Divisors: 1, 23, 73, 1679

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 11010001111

Octal: 3217

Duodecimal: B7B

Hexadecimal: 68f

Square: 2819041

Square Root: 40.97560249709576

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 parts in all partitions of n into distinct parts. A15723

a(n) = n² - 2. A8865

Numbers n such that n!3 - 3 is prime, where n!3 = n!!! is a triple factorial number (A007661). A242994

Numbers k such that both k and k + 1 are Niven numbers. A330927

a(n) = prime(n)*prime(n+1) - prime(n) - prime(n+1). A37165

Natural numbers of the form (prime(n)!-3)/3. A139191

Position of prime(n) in A302656, or -1 if prime(n) does not appear in A302656. A376776

Smallest multiple of n whose digits sum to n. A2998

Square array A(x,y) = y-th odd number 2i+1 (i>=1) for which A112049(2i+1)=x, or 0 if no such i exists; read by descending antidiagonals. A112070

Interleaved reading of A073577 and A053755. A214345