64590639 has 8 divisors (see below), whose sum is σ = 88899072. Its totient is φ = 41671320.

The previous prime is 64590607. The next prime is 64590649. The reversal of 64590639 is 93609546.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 64590639 - 2⁵ = 64590607 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 64590639.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64590649) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 347169 + ... + 347354.

It is an arithmetic number, because the mean of its divisors is an integer number (11112384).

Almost surely, 2^64590639 is an apocalyptic number.

64590639 is a deficient number, since it is larger than the sum of its proper divisors (24308433).

64590639 is a wasteful number, since it uses less digits than its factorization.

64590639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 694557.

The product of its (nonzero) digits is 174960, while the sum is 42.

The square root of 64590639 is about 8036.8301587131. The cubic root of 64590639 is about 401.2267318928.

The spelling of 64590639 in words is "sixty-four million, five hundred ninety thousand, six hundred thirty-nine".