64641297 has 32 divisors (see below), whose sum is σ = 101687040. Its totient is φ = 35758080.

The previous prime is 64641263. The next prime is 64641299. The reversal of 64641297 is 79214646.

It is a happy number.

64641297 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 64641297 - 2¹¹ = 64639249 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64641299) 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, 165979 + ... + 166367.

It is an arithmetic number, because the mean of its divisors is an integer number (3177720).

Almost surely, 2^64641297 is an apocalyptic number.

It is an amenable number.

64641297 is a deficient number, since it is larger than the sum of its proper divisors (37045743).

64641297 is a wasteful number, since it uses less digits than its factorization.

64641297 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 633.

The product of its digits is 72576, while the sum is 39.

The square root of 64641297 is about 8039.9811566943. The cubic root of 64641297 is about 401.3315976171.

The spelling of 64641297 in words is "sixty-four million, six hundred forty-one thousand, two hundred ninety-seven".