64884239 has 4 divisors (see below), whose sum is σ = 74153424. Its totient is φ = 55615056.

The previous prime is 64884229. The next prime is 64884251. The reversal of 64884239 is 93248846.

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

It is not a de Polignac number, because 64884239 - 2⁸ = 64883983 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 64884239.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64884229) 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, 4634582 + ... + 4634595.

It is an arithmetic number, because the mean of its divisors is an integer number (18538356).

Almost surely, 2^64884239 is an apocalyptic number.

64884239 is a deficient number, since it is larger than the sum of its proper divisors (9269185).

64884239 is an equidigital number, since it uses as much as digits as its factorization.

64884239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9269184.

The product of its digits is 331776, while the sum is 44.

The square root of 64884239 is about 8055.0753565687. The cubic root of 64884239 is about 401.8337451836.

The spelling of 64884239 in words is "sixty-four million, eight hundred eighty-four thousand, two hundred thirty-nine".