64293139 has 4 divisors (see below), whose sum is σ = 64442056. Its totient is φ = 64144224.

The previous prime is 64293137. The next prime is 64293143. The reversal of 64293139 is 93139246.

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 64293139 - 2¹ = 64293137 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 64293098 and 64293107.

It is not an unprimeable number, because it can be changed into a prime (64293137) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 73809 + ... + 74674.

It is an arithmetic number, because the mean of its divisors is an integer number (16110514).

Almost surely, 2^64293139 is an apocalyptic number.

64293139 is a deficient number, since it is larger than the sum of its proper divisors (148917).

64293139 is a wasteful number, since it uses less digits than its factorization.

64293139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148916.

The product of its digits is 34992, while the sum is 37.

The square root of 64293139 is about 8018.3002562887. The cubic root of 64293139 is about 400.6097762101.

The spelling of 64293139 in words is "sixty-four million, two hundred ninety-three thousand, one hundred thirty-nine".