Properties of the Number 19977

Nineteen Thousand Nine Hundred Seventy-Seven

Basics

Value: 19976 → 19977 → 19978

Parity: odd

Prime: No

Previous Prime: 19973

Next Prime: 19979

Digit Sum: 33

Digital Root: 6

Palindrome: No

Factorization: 3 × 6659

Divisors: 1, 3, 6659, 19977

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 100111000001001

Octal: 47011

Duodecimal: B689

Hexadecimal: 4e09

Square: 399080529

Square Root: 141.34001556530268

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

Array read by antidiagonals: A(n,k) is the number of nonequivalent nonnegative integer matrices with k columns and any number of nonzero rows with column sums n up to permutation of rows and columns. A331485

G.f.: ∑_n>=0 (n+1)*(n+2)/2·xⁿ * (1 + xⁿ)ⁿ. A326003

Unicode codes for the Han digits. A61745

Irregular triangle read by rows where T(n,k) is the number of non-isomorphic multiset partitions of a multiset with d = A027750(n, k) copies of each integer from 1 to n/d. A322787

Number of n-rowed matrices with entries {0,1,2,3} and all row sums 3, up to row and column permutation. A58194

Numbers k such that the continued fraction for sqrt(k) has even period and if the last term of the periodic part is deleted the central term is 94. A31592

Square array A(n, k) = A388283(A246278(n, k)), read by falling antidiagonals. Numerator of (3·n-σ(n))/n, as applied to the prime shift array. A388284

Decimal expansion of tangent of 79 degrees. A19977