53639657 has 16 divisors (see below), whose sum is σ = 57853440. Its totient is φ = 49612992.

The previous prime is 53639633. The next prime is 53639659. The reversal of 53639657 is 75693635.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-53639657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53639659) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 96023 + ... + 96579.

It is an arithmetic number, because the mean of its divisors is an integer number (3615840).

Almost surely, 2^53639657 is an apocalyptic number.

It is an amenable number.

53639657 is a deficient number, since it is larger than the sum of its proper divisors (4213783).

53639657 is a wasteful number, since it uses less digits than its factorization.

53639657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 712.

The product of its digits is 510300, while the sum is 44.

The square root of 53639657 is about 7323.9099530237. The cubic root of 53639657 is about 377.1336902465.

The spelling of 53639657 in words is "fifty-three million, six hundred thirty-nine thousand, six hundred fifty-seven".