397625172431 has 2 divisors, whose sum is σ = 397625172432. Its totient is φ = 397625172430.

The previous prime is 397625172383. The next prime is 397625172433. The reversal of 397625172431 is 134271526793.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 397625172431 - 2²² = 397620978127 is a prime.

It is a super-2 number, since 2×397625172431² (a number of 24 digits) contains 22 as substring.

Together with 397625172433, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 397625172431.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (397625172433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198812586215 + 198812586216.

It is an arithmetic number, because the mean of its divisors is an integer number (198812586216).

Almost surely, 2^397625172431 is an apocalyptic number.

397625172431 is a deficient number, since it is larger than the sum of its proper divisors (1).

397625172431 is an equidigital number, since it uses as much as digits as its factorization.

397625172431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1905120, while the sum is 50.

The spelling of 397625172431 in words is "three hundred ninety-seven billion, six hundred twenty-five million, one hundred seventy-two thousand, four hundred thirty-one".