397222907 has 2 divisors, whose sum is σ = 397222908. Its totient is φ = 397222906.

The previous prime is 397222843. The next prime is 397222913. The reversal of 397222907 is 709222793.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 397222907 - 2⁶ = 397222843 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (397222937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198611453 + 198611454.

It is an arithmetic number, because the mean of its divisors is an integer number (198611454).

Almost surely, 2^397222907 is an apocalyptic number.

397222907 is a deficient number, since it is larger than the sum of its proper divisors (1).

397222907 is an equidigital number, since it uses as much as digits as its factorization.

397222907 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 95256, while the sum is 41.

The square root of 397222907 is about 19930.4517510266. The cubic root of 397222907 is about 735.0971886229.

The spelling of 397222907 in words is "three hundred ninety-seven million, two hundred twenty-two thousand, nine hundred seven".