311617649 has 4 divisors (see below), whose sum is σ = 356134464. Its totient is φ = 267100836.

The previous prime is 311617627. The next prime is 311617679. The reversal of 311617649 is 946716113.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 311617649 - 2⁸ = 311617393 is a prime.

It is not an unprimeable number, because it can be changed into a prime (311617619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22258397 + ... + 22258410.

It is an arithmetic number, because the mean of its divisors is an integer number (89033616).

Almost surely, 2^311617649 is an apocalyptic number.

It is an amenable number.

311617649 is a deficient number, since it is larger than the sum of its proper divisors (44516815).

311617649 is an equidigital number, since it uses as much as digits as its factorization.

311617649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44516814.

The product of its digits is 27216, while the sum is 38.

The square root of 311617649 is about 17652.6952333064. The cubic root of 311617649 is about 677.9651169971.

The spelling of 311617649 in words is "three hundred eleven million, six hundred seventeen thousand, six hundred forty-nine".