311464891 has 4 divisors (see below), whose sum is σ = 327857800. Its totient is φ = 295071984.

The previous prime is 311464877. The next prime is 311464897. The reversal of 311464891 is 198464113.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 311464891 - 2⁷ = 311464763 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 311464891.

It is not an unprimeable number, because it can be changed into a prime (311464897) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8196426 + ... + 8196463.

It is an arithmetic number, because the mean of its divisors is an integer number (81964450).

Almost surely, 2^311464891 is an apocalyptic number.

311464891 is a deficient number, since it is larger than the sum of its proper divisors (16392909).

311464891 is a wasteful number, since it uses less digits than its factorization.

311464891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16392908.

The product of its digits is 20736, while the sum is 37.

The square root of 311464891 is about 17648.3679415407. The cubic root of 311464891 is about 677.8543171936.

The spelling of 311464891 in words is "three hundred eleven million, four hundred sixty-four thousand, eight hundred ninety-one".