5631639 has 16 divisors (see below), whose sum is σ = 8138592. Its totient is φ = 3443328.

The previous prime is 5631629. The next prime is 5631671. The reversal of 5631639 is 9361365.

It is not a de Polignac number, because 5631639 - 2⁴ = 5631623 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5631629) 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, 7317 + ... + 8049.

It is an arithmetic number, because the mean of its divisors is an integer number (508662).

Almost surely, 2^5631639 is an apocalyptic number.

5631639 is a deficient number, since it is larger than the sum of its proper divisors (2506953).

5631639 is a wasteful number, since it uses less digits than its factorization.

5631639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 946.

The product of its digits is 14580, while the sum is 33.

The square root of 5631639 is about 2373.1074564798. The cubic root of 5631639 is about 177.9146057590.

It can be divided in two parts, 56316 and 39, that multiplied together give a square (2196324 = 1482²).

The spelling of 5631639 in words is "five million, six hundred thirty-one thousand, six hundred thirty-nine".