397907 has 2 divisors, whose sum is σ = 397908. Its totient is φ = 397906.

The previous prime is 397897. The next prime is 397921. The reversal of 397907 is 709793.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 397907 - 2¹⁰ = 396883 is a prime.

It is a Chen prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 397907.

It is not a weakly prime, because it can be changed into another prime (397807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198953 + 198954.

It is an arithmetic number, because the mean of its divisors is an integer number (198954).

2³⁹⁷⁹⁰⁷ is an apocalyptic number.

397907 is a deficient number, since it is larger than the sum of its proper divisors (1).

397907 is an equidigital number, since it uses as much as digits as its factorization.

397907 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11907, while the sum is 35.

The square root of 397907 is about 630.7987000621. The cubic root of 397907 is about 73.5518938750.

The spelling of 397907 in words is "three hundred ninety-seven thousand, nine hundred seven".