397957123 has 2 divisors, whose sum is σ = 397957124. Its totient is φ = 397957122.

The previous prime is 397957117. The next prime is 397957127. The reversal of 397957123 is 321759793.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-397957123 is a prime.

It is not a weakly prime, because it can be changed into another prime (397957127) by changing a digit.

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 as a sum of consecutive naturals, namely, 198978561 + 198978562.

It is an arithmetic number, because the mean of its divisors is an integer number (198978562).

Almost surely, 2^397957123 is an apocalyptic number.

397957123 is a deficient number, since it is larger than the sum of its proper divisors (1).

397957123 is an equidigital number, since it uses as much as digits as its factorization.

397957123 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 357210, while the sum is 46.

The square root of 397957123 is about 19948.8626994122. The cubic root of 397957123 is about 735.5498210654.

The spelling of 397957123 in words is "three hundred ninety-seven million, nine hundred fifty-seven thousand, one hundred twenty-three".