43664313 has 32 divisors (see below), whose sum is σ = 76861440. Its totient is φ = 21346560.

The previous prime is 43664311. The next prime is 43664351. The reversal of 43664313 is 31346634.

43664313 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 43664313 - 2¹ = 43664311 is a prime.

It is not an unprimeable number, because it can be changed into a prime (43664311) 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 31 ways as a sum of consecutive naturals, for example, 1633 + ... + 9486.

It is an arithmetic number, because the mean of its divisors is an integer number (2401920).

Almost surely, 2^43664313 is an apocalyptic number.

It is an amenable number.

43664313 is a deficient number, since it is larger than the sum of its proper divisors (33197127).

43664313 is a wasteful number, since it uses less digits than its factorization.

43664313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11157.

The product of its digits is 15552, while the sum is 30.

The square root of 43664313 is about 6607.8977746330. The cubic root of 43664313 is about 352.1347436321.

The spelling of 43664313 in words is "forty-three million, six hundred sixty-four thousand, three hundred thirteen".