657069923 has 2 divisors, whose sum is σ = 657069924. Its totient is φ = 657069922.

The previous prime is 657069901. The next prime is 657069937. The reversal of 657069923 is 329960756.

657069923 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 657069923 - 2¹⁸ = 656807779 is a prime.

It is a super-2 number, since 2×657069923² = 863481767422451858, which contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (657069983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 328534961 + 328534962.

It is an arithmetic number, because the mean of its divisors is an integer number (328534962).

Almost surely, 2^657069923 is an apocalyptic number.

657069923 is a deficient number, since it is larger than the sum of its proper divisors (1).

657069923 is an equidigital number, since it uses as much as digits as its factorization.

657069923 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 612360, while the sum is 47.

The square root of 657069923 is about 25633.3751776858. The cubic root of 657069923 is about 869.3684247836.

The spelling of 657069923 in words is "six hundred fifty-seven million, sixty-nine thousand, nine hundred twenty-three".