397468879 has 2 divisors, whose sum is σ = 397468880. Its totient is φ = 397468878.

The previous prime is 397468873. The next prime is 397468943. The reversal of 397468879 is 978864793.

It is a weak prime.

It is an emirp because it is prime and its reverse (978864793) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 397468879 - 2³ = 397468871 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (397468871) 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, 198734439 + 198734440.

It is an arithmetic number, because the mean of its divisors is an integer number (198734440).

Almost surely, 2^397468879 is an apocalyptic number.

397468879 is a deficient number, since it is larger than the sum of its proper divisors (1).

397468879 is an equidigital number, since it uses as much as digits as its factorization.

397468879 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18289152, while the sum is 61.

The square root of 397468879 is about 19936.6215543156. The cubic root of 397468879 is about 735.2488885154.

The spelling of 397468879 in words is "three hundred ninety-seven million, four hundred sixty-eight thousand, eight hundred seventy-nine".