88639 has 4 divisors (see below), whose sum is σ = 89424. Its totient is φ = 87856.

The previous prime is 88609. The next prime is 88643. The reversal of 88639 is 93688.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 88639 - 2⁵ = 88607 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (88609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 187 + ... + 460.

It is an arithmetic number, because the mean of its divisors is an integer number (22356).

2⁸⁸⁶³⁹ is an apocalyptic number.

88639 is a deficient number, since it is larger than the sum of its proper divisors (785).

88639 is a wasteful number, since it uses less digits than its factorization.

88639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 784.

The product of its digits is 10368, while the sum is 34.

The square root of 88639 is about 297.7230256463. The cubic root of 88639 is about 44.5870031237.

It can be divided in two parts, 88 and 639, that added together give a palindrome (727).

The spelling of 88639 in words is "eighty-eight thousand, six hundred thirty-nine".