397254647 has 2 divisors, whose sum is σ = 397254648. Its totient is φ = 397254646.

The previous prime is 397254629. The next prime is 397254703. The reversal of 397254647 is 746452793.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 397254647 - 2⁸ = 397254391 is a prime.

It is a super-2 number, since 2×397254647² = 315622509126189218, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (397254047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198627323 + 198627324.

It is an arithmetic number, because the mean of its divisors is an integer number (198627324).

Almost surely, 2^397254647 is an apocalyptic number.

397254647 is a deficient number, since it is larger than the sum of its proper divisors (1).

397254647 is an equidigital number, since it uses as much as digits as its factorization.

397254647 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1270080, while the sum is 47.

The square root of 397254647 is about 19931.2480040764. The cubic root of 397254647 is about 735.1167673556.

The spelling of 397254647 in words is "three hundred ninety-seven million, two hundred fifty-four thousand, six hundred forty-seven".