64208913 has 4 divisors (see below), whose sum is σ = 85611888. Its totient is φ = 42805940.

The previous prime is 64208897. The next prime is 64208941. The reversal of 64208913 is 31980246.

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.

It is a cyclic number.

It is not a de Polignac number, because 64208913 - 2⁴ = 64208897 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64208113) 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 3 ways as a sum of consecutive naturals, for example, 10701483 + ... + 10701488.

It is an arithmetic number, because the mean of its divisors is an integer number (21402972).

Almost surely, 2^64208913 is an apocalyptic number.

It is an amenable number.

64208913 is a deficient number, since it is larger than the sum of its proper divisors (21402975).

64208913 is a wasteful number, since it uses less digits than its factorization.

64208913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21402974.

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 64208913 is about 8013.0464244256. The cubic root of 64208913 is about 400.4347626990.

The spelling of 64208913 in words is "sixty-four million, two hundred eight thousand, nine hundred thirteen".