64351139 has 4 divisors (see below), whose sum is σ = 64381056. Its totient is φ = 64321224.

The previous prime is 64351121. The next prime is 64351141. The reversal of 64351139 is 93115346.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 64351139 - 2²⁴ = 47573923 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64351439) 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 3 ways as a sum of consecutive naturals, for example, 11459 + ... + 16124.

It is an arithmetic number, because the mean of its divisors is an integer number (16095264).

Almost surely, 2^64351139 is an apocalyptic number.

64351139 is a deficient number, since it is larger than the sum of its proper divisors (29917).

64351139 is a wasteful number, since it uses less digits than its factorization.

64351139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29916.

The product of its digits is 9720, while the sum is 32.

The square root of 64351139 is about 8021.9161675999. The cubic root of 64351139 is about 400.7302057710.

The spelling of 64351139 in words is "sixty-four million, three hundred fifty-one thousand, one hundred thirty-nine".