64977239 has 8 divisors (see below), whose sum is σ = 65953200. Its totient is φ = 64008000.

The previous prime is 64977229. The next prime is 64977259. The reversal of 64977239 is 93277946.

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 64977239 - 2⁴ = 64977223 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 64977193 and 64977202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64977229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19787 + ... + 22835.

It is an arithmetic number, because the mean of its divisors is an integer number (8244150).

Almost surely, 2^64977239 is an apocalyptic number.

64977239 is a deficient number, since it is larger than the sum of its proper divisors (975961).

64977239 is a wasteful number, since it uses less digits than its factorization.

64977239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3361.

The product of its digits is 571536, while the sum is 47.

The square root of 64977239 is about 8060.8460474072. The cubic root of 64977239 is about 402.0256392317.

The spelling of 64977239 in words is "sixty-four million, nine hundred seventy-seven thousand, two hundred thirty-nine".