678685941 has 6 divisors (see below), whose sum is σ = 980324150. Its totient is φ = 452457288.

The previous prime is 678685933. The next prime is 678685949. The reversal of 678685941 is 149586876.

It is an interprime number because it is at equal distance from previous prime (678685933) and next prime (678685949).

It can be written as a sum of positive squares in only one way, i.e., 454585041 + 224100900 = 21321^2 + 14970^2 .

It is not a de Polignac number, because 678685941 - 2³ = 678685933 is a prime.

It is a super-2 number, since 2×678685941² = 921229213022110962, 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 (678685949) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 37704766 + ... + 37704783.

Almost surely, 2^678685941 is an apocalyptic number.

It is an amenable number.

678685941 is a deficient number, since it is larger than the sum of its proper divisors (301638209).

678685941 is a wasteful number, since it uses less digits than its factorization.

678685941 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75409555 (or 75409552 counting only the distinct ones).

The product of its digits is 2903040, while the sum is 54.

The square root of 678685941 is about 26051.6015054737. The cubic root of 678685941 is about 878.7991286194.

The spelling of 678685941 in words is "six hundred seventy-eight million, six hundred eighty-five thousand, nine hundred forty-one".