677942957 has 2 divisors, whose sum is σ = 677942958. Its totient is φ = 677942956.

The previous prime is 677942953. The next prime is 677942977. The reversal of 677942957 is 759249776.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 673194916 + 4748041 = 25946^2 + 2179^2 .

It is a cyclic number.

It is not a de Polignac number, because 677942957 - 2² = 677942953 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (677942953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 338971478 + 338971479.

It is an arithmetic number, because the mean of its divisors is an integer number (338971479).

Almost surely, 2^677942957 is an apocalyptic number.

It is an amenable number.

677942957 is a deficient number, since it is larger than the sum of its proper divisors (1).

677942957 is an equidigital number, since it uses as much as digits as its factorization.

677942957 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6667920, while the sum is 56.

The square root of 677942957 is about 26037.3377479342. The cubic root of 677942957 is about 878.4783262859.

The spelling of 677942957 in words is "six hundred seventy-seven million, nine hundred forty-two thousand, nine hundred fifty-seven".