397651123 has 2 divisors, whose sum is σ = 397651124. Its totient is φ = 397651122.

The previous prime is 397650991. The next prime is 397651127. The reversal of 397651123 is 321156793.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-397651123 is a prime.

It is a super-2 number, since 2×397651123² = 316252831246322258, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (397651127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198825561 + 198825562.

It is an arithmetic number, because the mean of its divisors is an integer number (198825562).

Almost surely, 2^397651123 is an apocalyptic number.

397651123 is a deficient number, since it is larger than the sum of its proper divisors (1).

397651123 is an equidigital number, since it uses as much as digits as its factorization.

397651123 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34020, while the sum is 37.

The square root of 397651123 is about 19941.1916143444. The cubic root of 397651123 is about 735.3612446699.

The spelling of 397651123 in words is "three hundred ninety-seven million, six hundred fifty-one thousand, one hundred twenty-three".