397868711 has 2 divisors, whose sum is σ = 397868712. Its totient is φ = 397868710.

The previous prime is 397868707. The next prime is 397868729. The reversal of 397868711 is 117868793.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 397868711 - 2² = 397868707 is a prime.

It is a super-2 number, since 2×397868711² = 316599022385603042, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 397868711.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (397868701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198934355 + 198934356.

It is an arithmetic number, because the mean of its divisors is an integer number (198934356).

Almost surely, 2^397868711 is an apocalyptic number.

397868711 is a deficient number, since it is larger than the sum of its proper divisors (1).

397868711 is an equidigital number, since it uses as much as digits as its factorization.

397868711 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 508032, while the sum is 50.

The square root of 397868711 is about 19946.6466103954. The cubic root of 397868711 is about 735.4953459780.

The spelling of 397868711 in words is "three hundred ninety-seven million, eight hundred sixty-eight thousand, seven hundred eleven".