31872853 has 2 divisors, whose sum is σ = 31872854. Its totient is φ = 31872852.

The previous prime is 31872851. The next prime is 31872859. The reversal of 31872853 is 35827813.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30669444 + 1203409 = 5538^2 + 1097^2 .

It is a cyclic number.

It is not a de Polignac number, because 31872853 - 2¹ = 31872851 is a prime.

Together with 31872851, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31872851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15936426 + 15936427.

It is an arithmetic number, because the mean of its divisors is an integer number (15936427).

Almost surely, 2^31872853 is an apocalyptic number.

It is an amenable number.

31872853 is a deficient number, since it is larger than the sum of its proper divisors (1).

31872853 is an equidigital number, since it uses as much as digits as its factorization.

31872853 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40320, while the sum is 37.

The square root of 31872853 is about 5645.6047506002. The cubic root of 31872853 is about 317.0591662460.

The spelling of 31872853 in words is "thirty-one million, eight hundred seventy-two thousand, eight hundred fifty-three".