64388913 has 8 divisors (see below), whose sum is σ = 85984800. Its totient is φ = 42859488.

The previous prime is 64388897. The next prime is 64388921. The reversal of 64388913 is 31988346.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 64388913 - 2⁴ = 64388897 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64388923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14308 + ... + 18261.

It is an arithmetic number, because the mean of its divisors is an integer number (10748100).

Almost surely, 2^64388913 is an apocalyptic number.

It is an amenable number.

64388913 is a deficient number, since it is larger than the sum of its proper divisors (21595887).

64388913 is a wasteful number, since it uses less digits than its factorization.

64388913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33231.

The product of its digits is 124416, while the sum is 42.

The square root of 64388913 is about 8024.2702471938. The cubic root of 64388913 is about 400.8085997314.

It can be divided in two parts, 6438 and 8913, that added together give a palindrome (15351).

The spelling of 64388913 in words is "sixty-four million, three hundred eighty-eight thousand, nine hundred thirteen".