77326431 has 32 divisors (see below), whose sum is σ = 131002368. Its totient is φ = 39467520.

The previous prime is 77326373. The next prime is 77326477. The reversal of 77326431 is 13462377.

It is not a de Polignac number, because 77326431 - 2⁶ = 77326367 is a prime.

It is a super-2 number, since 2×77326431² = 11958753862395522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 77326392 and 77326401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77326481) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3895 + ... + 13031.

It is an arithmetic number, because the mean of its divisors is an integer number (4093824).

Almost surely, 2^77326431 is an apocalyptic number.

77326431 is a deficient number, since it is larger than the sum of its proper divisors (53675937).

77326431 is a wasteful number, since it uses less digits than its factorization.

77326431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9191.

The product of its digits is 21168, while the sum is 33.

The square root of 77326431 is about 8793.5448483533. The cubic root of 77326431 is about 426.0324260622.

The spelling of 77326431 in words is "seventy-seven million, three hundred twenty-six thousand, four hundred thirty-one".