311898401 has 2 divisors, whose sum is σ = 311898402. Its totient is φ = 311898400.

The previous prime is 311898397. The next prime is 311898437. The reversal of 311898401 is 104898113.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 311875600 + 22801 = 17660^2 + 151^2 .

It is a cyclic number.

It is not a de Polignac number, because 311898401 - 2² = 311898397 is a prime.

It is a super-2 number, since 2×311898401² = 194561225092713602, which contains 22 as substring.

It is equal to p_16861409 and since 311898401 and 16861409 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (311898001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155949200 + 155949201.

It is an arithmetic number, because the mean of its divisors is an integer number (155949201).

Almost surely, 2^311898401 is an apocalyptic number.

It is an amenable number.

311898401 is a deficient number, since it is larger than the sum of its proper divisors (1).

311898401 is an equidigital number, since it uses as much as digits as its factorization.

311898401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 35.

The square root of 311898401 is about 17660.6455431278. The cubic root of 311898401 is about 678.1686601633.

The spelling of 311898401 in words is "three hundred eleven million, eight hundred ninety-eight thousand, four hundred one".