64238539 has 4 divisors (see below), whose sum is σ = 64483056. Its totient is φ = 63994024.

The previous prime is 64238507. The next prime is 64238543. The reversal of 64238539 is 93583246.

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 64238539 - 2⁵ = 64238507 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64238569) 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, 121864 + ... + 122389.

It is an arithmetic number, because the mean of its divisors is an integer number (16120764).

Almost surely, 2^64238539 is an apocalyptic number.

64238539 is a deficient number, since it is larger than the sum of its proper divisors (244517).

64238539 is a wasteful number, since it uses less digits than its factorization.

64238539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244516.

The product of its digits is 155520, while the sum is 40.

The square root of 64238539 is about 8014.8948215182. The cubic root of 64238539 is about 400.4963401115.

The spelling of 64238539 in words is "sixty-four million, two hundred thirty-eight thousand, five hundred thirty-nine".