396366881 has 2 divisors, whose sum is σ = 396366882. Its totient is φ = 396366880.

The previous prime is 396366871. The next prime is 396366907. The reversal of 396366881 is 188663693.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 322561600 + 73805281 = 17960^2 + 8591^2 .

It is an emirp because it is prime and its reverse (188663693) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 396366881 - 2²² = 392172577 is a prime.

It is a super-2 number, since 2×396366881² = 314213408707336322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (396366811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198183440 + 198183441.

It is an arithmetic number, because the mean of its divisors is an integer number (198183441).

Almost surely, 2^396366881 is an apocalyptic number.

It is an amenable number.

396366881 is a deficient number, since it is larger than the sum of its proper divisors (1).

396366881 is an equidigital number, since it uses as much as digits as its factorization.

396366881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1119744, while the sum is 50.

The square root of 396366881 is about 19908.9648399911. The cubic root of 396366881 is about 734.5687574721.

The spelling of 396366881 in words is "three hundred ninety-six million, three hundred sixty-six thousand, eight hundred eighty-one".