64229939 has 4 divisors (see below), whose sum is σ = 64287960. Its totient is φ = 64171920.

The previous prime is 64229933. The next prime is 64229947. The reversal of 64229939 is 93992246.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64229939 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 64229939.

It is not an unprimeable number, because it can be changed into a prime (64229933) 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, 27317 + ... + 29574.

It is an arithmetic number, because the mean of its divisors is an integer number (16071990).

Almost surely, 2^64229939 is an apocalyptic number.

64229939 is a deficient number, since it is larger than the sum of its proper divisors (58021).

64229939 is a wasteful number, since it uses less digits than its factorization.

64229939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58020.

The product of its digits is 209952, while the sum is 44.

The square root of 64229939 is about 8014.3583024469. The cubic root of 64229939 is about 400.4784670284.

It can be divided in two parts, 6422 and 9939, that added together give a palindrome (16361).

The spelling of 64229939 in words is "sixty-four million, two hundred twenty-nine thousand, nine hundred thirty-nine".