678470931 has 8 divisors (see below), whose sum is σ = 1005142160. Its totient is φ = 452313936.

The previous prime is 678470927. The next prime is 678470953. The reversal of 678470931 is 139074876.

It is not a de Polignac number, because 678470931 - 2² = 678470927 is a prime.

It is a super-2 number, since 2×678470931² = 920645608424013522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (678470971) 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, 12564250 + ... + 12564303.

It is an arithmetic number, because the mean of its divisors is an integer number (125642770).

Almost surely, 2^678470931 is an apocalyptic number.

678470931 is a deficient number, since it is larger than the sum of its proper divisors (326671229).

678470931 is a wasteful number, since it uses less digits than its factorization.

678470931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25128562 (or 25128556 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 45.

The square root of 678470931 is about 26047.4745608859. The cubic root of 678470931 is about 878.7063166396.

The spelling of 678470931 in words is "six hundred seventy-eight million, four hundred seventy thousand, nine hundred thirty-one".