672697957 has 2 divisors, whose sum is σ = 672697958. Its totient is φ = 672697956.

The previous prime is 672697943. The next prime is 672698003. The reversal of 672697957 is 759796276.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 492440481 + 180257476 = 22191^2 + 13426^2 .

It is a cyclic number.

It is not a de Polignac number, because 672697957 - 2⁷ = 672697829 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (672697937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 336348978 + 336348979.

It is an arithmetic number, because the mean of its divisors is an integer number (336348979).

Almost surely, 2^672697957 is an apocalyptic number.

It is an amenable number.

672697957 is a deficient number, since it is larger than the sum of its proper divisors (1).

672697957 is an equidigital number, since it uses as much as digits as its factorization.

672697957 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10001880, while the sum is 58.

The square root of 672697957 is about 25936.4214378160. The cubic root of 672697957 is about 876.2069686907.

The spelling of 672697957 in words is "six hundred seventy-two million, six hundred ninety-seven thousand, nine hundred fifty-seven".