397397207 has 2 divisors, whose sum is σ = 397397208. Its totient is φ = 397397206.

The previous prime is 397397201. The next prime is 397397227. The reversal of 397397207 is 702793793.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 397397207 - 2²⁴ = 380619991 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (397397201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198698603 + 198698604.

It is an arithmetic number, because the mean of its divisors is an integer number (198698604).

Almost surely, 2^397397207 is an apocalyptic number.

397397207 is a deficient number, since it is larger than the sum of its proper divisors (1).

397397207 is an equidigital number, since it uses as much as digits as its factorization.

397397207 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 500094, while the sum is 47.

The square root of 397397207 is about 19934.8239771511. The cubic root of 397397207 is about 735.2046922451.

The spelling of 397397207 in words is "three hundred ninety-seven million, three hundred ninety-seven thousand, two hundred seven".