776972431 has 2 divisors, whose sum is σ = 776972432. Its totient is φ = 776972430.

The previous prime is 776972393. The next prime is 776972467. The reversal of 776972431 is 134279677.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 776972431 - 2⁷ = 776972303 is a prime.

It is a super-2 number, since 2×776972431² = 1207372317068099522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (776912431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 388486215 + 388486216.

It is an arithmetic number, because the mean of its divisors is an integer number (388486216).

Almost surely, 2^776972431 is an apocalyptic number.

776972431 is a deficient number, since it is larger than the sum of its proper divisors (1).

776972431 is an equidigital number, since it uses as much as digits as its factorization.

776972431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 444528, while the sum is 46.

The square root of 776972431 is about 27874.2252089632. The cubic root of 776972431 is about 919.3238695528.

It can be divided in two parts, 7769 and 72431, that added together give a triangular number (80200 = T₄₀₀).

The spelling of 776972431 in words is "seven hundred seventy-six million, nine hundred seventy-two thousand, four hundred thirty-one".