397867699 has 2 divisors, whose sum is σ = 397867700. Its totient is φ = 397867698.

The previous prime is 397867663. The next prime is 397867703. The reversal of 397867699 is 996768793.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 397867699 - 2⁷ = 397867571 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 397867699.

It is not a weakly prime, because it can be changed into another prime (397867199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198933849 + 198933850.

It is an arithmetic number, because the mean of its divisors is an integer number (198933850).

Almost surely, 2^397867699 is an apocalyptic number.

397867699 is a deficient number, since it is larger than the sum of its proper divisors (1).

397867699 is an equidigital number, since it uses as much as digits as its factorization.

397867699 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30862944, while the sum is 64.

The square root of 397867699 is about 19946.6212427067. The cubic root of 397867699 is about 735.4947223871.

The spelling of 397867699 in words is "three hundred ninety-seven million, eight hundred sixty-seven thousand, six hundred ninety-nine".