311079749 has 4 divisors (see below), whose sum is σ = 311135136. Its totient is φ = 311024364.

The previous prime is 311079721. The next prime is 311079773. The reversal of 311079749 is 947970113.

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, and also an emirpimes, since its reverse is a distinct semiprime: 947970113 = 821 ⋅1154653.

It is a cyclic number.

It is not a de Polignac number, because 311079749 - 2⁸ = 311079493 is a prime.

It is a super-2 number, since 2×311079749² = 193541220475806002, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311079779) 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, 18179 + ... + 30864.

It is an arithmetic number, because the mean of its divisors is an integer number (77783784).

Almost surely, 2^311079749 is an apocalyptic number.

It is an amenable number.

311079749 is a deficient number, since it is larger than the sum of its proper divisors (55387).

311079749 is an equidigital number, since it uses as much as digits as its factorization.

311079749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55386.

The product of its (nonzero) digits is 47628, while the sum is 41.

The square root of 311079749 is about 17637.4530190728. The cubic root of 311079749 is about 677.5748016337.

The spelling of 311079749 in words is "three hundred eleven million, seventy-nine thousand, seven hundred forty-nine".