785394431 has 4 divisors (see below), whose sum is σ = 826731000. Its totient is φ = 744057864.

The previous prime is 785394427. The next prime is 785394451. The reversal of 785394431 is 134493587.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 785394431 - 2² = 785394427 is a prime.

It is a super-2 number, since 2×785394431² = 1233688824491627522, 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 (785394451) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20668256 + ... + 20668293.

It is an arithmetic number, because the mean of its divisors is an integer number (206682750).

Almost surely, 2^785394431 is an apocalyptic number.

785394431 is a deficient number, since it is larger than the sum of its proper divisors (41336569).

785394431 is a wasteful number, since it uses less digits than its factorization.

785394431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41336568.

The product of its digits is 362880, while the sum is 44.

The square root of 785394431 is about 28024.8894913075. The cubic root of 785394431 is about 922.6336127932.

The spelling of 785394431 in words is "seven hundred eighty-five million, three hundred ninety-four thousand, four hundred thirty-one".