31872873 has 16 divisors (see below), whose sum is σ = 44093376. Its totient is φ = 20462400.

The previous prime is 31872859. The next prime is 31872889. The reversal of 31872873 is 37827813.

It is not a de Polignac number, because 31872873 - 2¹⁰ = 31871849 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31872853) 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, 9790 + ... + 12632.

It is an arithmetic number, because the mean of its divisors is an integer number (2755836).

Almost surely, 2^31872873 is an apocalyptic number.

It is an amenable number.

31872873 is a deficient number, since it is larger than the sum of its proper divisors (12220503).

31872873 is a wasteful number, since it uses less digits than its factorization.

31872873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2984.

The product of its digits is 56448, while the sum is 39.

The square root of 31872873 is about 5645.6065218894. The cubic root of 31872873 is about 317.0592325635.

It can be divided in two parts, 318728 and 73, that added together give a triangular number (318801 = T₇₉₈).

The spelling of 31872873 in words is "thirty-one million, eight hundred seventy-two thousand, eight hundred seventy-three".