397199290457 has 2 divisors, whose sum is σ = 397199290458. Its totient is φ = 397199290456.

The previous prime is 397199290399. The next prime is 397199290507. The reversal of 397199290457 is 754092991793.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 314349727561 + 82849562896 = 560669^2 + 287836^2 .

It is a cyclic number.

It is not a de Polignac number, because 397199290457 - 2⁶ = 397199290393 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 397199290393 and 397199290402.

It is not a weakly prime, because it can be changed into another prime (397199190457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198599645228 + 198599645229.

It is an arithmetic number, because the mean of its divisors is an integer number (198599645229).

Almost surely, 2^397199290457 is an apocalyptic number.

It is an amenable number.

397199290457 is a deficient number, since it is larger than the sum of its proper divisors (1).

397199290457 is an equidigital number, since it uses as much as digits as its factorization.

397199290457 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 38578680, while the sum is 65.

The spelling of 397199290457 in words is "three hundred ninety-seven billion, one hundred ninety-nine million, two hundred ninety thousand, four hundred fifty-seven".