64368139 has 8 divisors (see below), whose sum is σ = 72641520. Its totient is φ = 56498400.

The previous prime is 64368131. The next prime is 64368151. The reversal of 64368139 is 93186346.

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

It is a cyclic number.

It is not a de Polignac number, because 64368139 - 2³ = 64368131 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64368131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 100572 + ... + 101209.

It is an arithmetic number, because the mean of its divisors is an integer number (9080190).

Almost surely, 2^64368139 is an apocalyptic number.

64368139 is a deficient number, since it is larger than the sum of its proper divisors (8273381).

64368139 is a wasteful number, since it uses less digits than its factorization.

64368139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201821.

The product of its digits is 93312, while the sum is 40.

The square root of 64368139 is about 8022.9756948404. The cubic root of 64368139 is about 400.7654903767.

The spelling of 64368139 in words is "sixty-four million, three hundred sixty-eight thousand, one hundred thirty-nine".