311010649 has 4 divisors (see below), whose sum is σ = 311450020. Its totient is φ = 310571280.

The previous prime is 311010643. The next prime is 311010659. The reversal of 311010649 is 946010113.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 946010113 = 7369 ⋅128377.

It can be written as a sum of positive squares in 2 ways, for example, as 43099225 + 267911424 = 6565^2 + 16368^2 .

It is a cyclic number.

It is not a de Polignac number, because 311010649 - 2⁵ = 311010617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (311010643) 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, 218622 + ... + 220039.

It is an arithmetic number, because the mean of its divisors is an integer number (77862505).

Almost surely, 2^311010649 is an apocalyptic number.

It is an amenable number.

311010649 is a deficient number, since it is larger than the sum of its proper divisors (439371).

311010649 is an equidigital number, since it uses as much as digits as its factorization.

311010649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 439370.

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 311010649 is about 17635.4940106593. The cubic root of 311010649 is about 677.5246281267.

The spelling of 311010649 in words is "three hundred eleven million, ten thousand, six hundred forty-nine".