609632639 has 32 divisors (see below), whose sum is σ = 791150592. Its totient is φ = 455868000.

The previous prime is 609632623. The next prime is 609632671. The reversal of 609632639 is 936236906.

609632639 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 609632639 - 2⁴ = 609632623 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 609632639.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (609632039) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 302144 + ... + 304154.

It is an arithmetic number, because the mean of its divisors is an integer number (24723456).

Almost surely, 2^609632639 is an apocalyptic number.

609632639 is a deficient number, since it is larger than the sum of its proper divisors (181517953).

609632639 is a wasteful number, since it uses less digits than its factorization.

609632639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2187.

The product of its (nonzero) digits is 314928, while the sum is 44.

The square root of 609632639 is about 24690.7399443597. The cubic root of 609632639 is about 847.9223253992.

The spelling of 609632639 in words is "six hundred nine million, six hundred thirty-two thousand, six hundred thirty-nine".