397157459 has 2 divisors, whose sum is σ = 397157460. Its totient is φ = 397157458.

The previous prime is 397157413. The next prime is 397157471. The reversal of 397157459 is 954751793.

It is a strong prime.

It is an emirp because it is prime and its reverse (954751793) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 397157459 - 2⁸ = 397157203 is a prime.

It is not a weakly prime, because it can be changed into another prime (397157359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198578729 + 198578730.

It is an arithmetic number, because the mean of its divisors is an integer number (198578730).

Almost surely, 2^397157459 is an apocalyptic number.

397157459 is a deficient number, since it is larger than the sum of its proper divisors (1).

397157459 is an equidigital number, since it uses as much as digits as its factorization.

397157459 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1190700, while the sum is 50.

The square root of 397157459 is about 19928.8097737923. The cubic root of 397157459 is about 735.0568139093.

It can be divided in two parts, 39715 and 7459, that added together give a palindrome (47174).

The spelling of 397157459 in words is "three hundred ninety-seven million, one hundred fifty-seven thousand, four hundred fifty-nine".