707991431 has 8 divisors (see below), whose sum is σ = 827950464. Its totient is φ = 592736760.

The previous prime is 707991419. The next prime is 707991523. The reversal of 707991431 is 134199707.

707991431 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-707991431 is a prime.

It is a super-2 number, since 2×707991431² = 1002503732738855522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (707991931) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1175765 + ... + 1176366.

It is an arithmetic number, because the mean of its divisors is an integer number (103493808).

Almost surely, 2^707991431 is an apocalyptic number.

707991431 is a deficient number, since it is larger than the sum of its proper divisors (119959033).

707991431 is a wasteful number, since it uses less digits than its factorization.

707991431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2352181.

The product of its (nonzero) digits is 47628, while the sum is 41.

The square root of 707991431 is about 26608.1083694426. The cubic root of 707991431 is about 891.2700929503.

The spelling of 707991431 in words is "seven hundred seven million, nine hundred ninety-one thousand, four hundred thirty-one".