53639539 has 4 divisors (see below), whose sum is σ = 56794824. Its totient is φ = 50484256.

The previous prime is 53639513. The next prime is 53639561. The reversal of 53639539 is 93593635.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93593635 = 5 ⋅18718727.

It is a cyclic number.

It is not a de Polignac number, because 53639539 - 2⁵ = 53639507 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 53639495 and 53639504.

It is not an unprimeable number, because it can be changed into a prime (53639569) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1577617 + ... + 1577650.

It is an arithmetic number, because the mean of its divisors is an integer number (14198706).

Almost surely, 2^53639539 is an apocalyptic number.

53639539 is a deficient number, since it is larger than the sum of its proper divisors (3155285).

53639539 is a wasteful number, since it uses less digits than its factorization.

53639539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3155284.

The product of its digits is 328050, while the sum is 43.

The square root of 53639539 is about 7323.9018972130. The cubic root of 53639539 is about 377.1334136986.

The spelling of 53639539 in words is "fifty-three million, six hundred thirty-nine thousand, five hundred thirty-nine".