311696649 has 48 divisors (see below), whose sum is σ = 523635840. Its totient is φ = 176570880.

The previous prime is 311696629. The next prime is 311696687. The reversal of 311696649 is 946696113.

It is not a de Polignac number, because 311696649 - 2⁵ = 311696617 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (311696629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 280507 + ... + 281615.

It is an arithmetic number, because the mean of its divisors is an integer number (10909080).

Almost surely, 2^311696649 is an apocalyptic number.

It is an amenable number.

311696649 is a deficient number, since it is larger than the sum of its proper divisors (211939191).

311696649 is a wasteful number, since it uses less digits than its factorization.

311696649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1310 (or 1307 counting only the distinct ones).

The product of its digits is 209952, while the sum is 45.

The square root of 311696649 is about 17654.9327101521. The cubic root of 311696649 is about 678.0224037810.

The spelling of 311696649 in words is "three hundred eleven million, six hundred ninety-six thousand, six hundred forty-nine".