397039207 has 2 divisors, whose sum is σ = 397039208. Its totient is φ = 397039206.

The previous prime is 397039187. The next prime is 397039213. The reversal of 397039207 is 702930793.

It is a strong prime.

It is an emirp because it is prime and its reverse (702930793) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 397039207 - 2²³ = 388650599 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 397039207.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (397039217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198519603 + 198519604.

It is an arithmetic number, because the mean of its divisors is an integer number (198519604).

Almost surely, 2^397039207 is an apocalyptic number.

397039207 is a deficient number, since it is larger than the sum of its proper divisors (1).

397039207 is an equidigital number, since it uses as much as digits as its factorization.

397039207 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 71442, while the sum is 40.

The square root of 397039207 is about 19925.8426923430. The cubic root of 397039207 is about 734.9838532865.

The spelling of 397039207 in words is "three hundred ninety-seven million, thirty-nine thousand, two hundred seven".