678971950 has 12 divisors (see below), whose sum is σ = 1262887920. Its totient is φ = 271588760.

The previous prime is 678971939. The next prime is 678971977. The reversal of 678971950 is 59179876.

It is a happy number.

It is a super-2 number, since 2×678971950² = 922005817773605000, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6789670 + ... + 6789769.

It is an arithmetic number, because the mean of its divisors is an integer number (105240660).

Almost surely, 2^678971950 is an apocalyptic number.

678971950 is a deficient number, since it is larger than the sum of its proper divisors (583915970).

678971950 is a wasteful number, since it uses less digits than its factorization.

678971950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13579451 (or 13579446 counting only the distinct ones).

The product of its (nonzero) digits is 952560, while the sum is 52.

The square root of 678971950 is about 26057.0902059305. The cubic root of 678971950 is about 878.9225579045.

The spelling of 678971950 in words is "six hundred seventy-eight million, nine hundred seventy-one thousand, nine hundred fifty".