685496431 has 8 divisors (see below), whose sum is σ = 694310400. Its totient is φ = 676738200.

The previous prime is 685496417. The next prime is 685496437. The reversal of 685496431 is 134694586.

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

It is a cyclic number.

It is not a de Polignac number, because 685496431 - 2⁹ = 685495919 is a prime.

It is a super-2 number, since 2×685496431² = 939810713827475522, 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 (685496437) 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, 11106 + ... + 38656.

It is an arithmetic number, because the mean of its divisors is an integer number (86788800).

Almost surely, 2^685496431 is an apocalyptic number.

685496431 is a deficient number, since it is larger than the sum of its proper divisors (8813969).

685496431 is a wasteful number, since it uses less digits than its factorization.

685496431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27869.

The product of its digits is 622080, while the sum is 46.

The square root of 685496431 is about 26181.9867657136. The cubic root of 685496431 is about 881.7288803377.

It can be divided in two parts, 6854 and 96431, that added together give a triangular number (103285 = T₄₅₄).

The spelling of 685496431 in words is "six hundred eighty-five million, four hundred ninety-six thousand, four hundred thirty-one".