53639 has 2 divisors, whose sum is σ = 53640. Its totient is φ = 53638.

The previous prime is 53633. The next prime is 53653. The reversal of 53639 is 93635.

53639 is nontrivially palindromic in base 9.

53639 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 53639 - 2⁴ = 53623 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26819 + 26820.

It is an arithmetic number, because the mean of its divisors is an integer number (26820).

2⁵³⁶³⁹ is an apocalyptic number.

53639 is a deficient number, since it is larger than the sum of its proper divisors (1).

53639 is an equidigital number, since it uses as much as digits as its factorization.

53639 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2430, while the sum is 26.

The square root of 53639 is about 231.6009499117. The cubic root of 53639 is about 37.7132150479.

It can be divided in two parts, 536 and 39, that added together give a palindrome (575).

The spelling of 53639 in words is "fifty-three thousand, six hundred thirty-nine".