31899853 has 2 divisors, whose sum is σ = 31899854. Its totient is φ = 31899852.

The previous prime is 31899811. The next prime is 31899869. The reversal of 31899853 is 35899813.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30228004 + 1671849 = 5498^2 + 1293^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31899853 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31899893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15949926 + 15949927.

It is an arithmetic number, because the mean of its divisors is an integer number (15949927).

Almost surely, 2^31899853 is an apocalyptic number.

It is an amenable number.

31899853 is a deficient number, since it is larger than the sum of its proper divisors (1).

31899853 is an equidigital number, since it uses as much as digits as its factorization.

31899853 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 233280, while the sum is 46.

The square root of 31899853 is about 5647.9954851257. The cubic root of 31899853 is about 317.1486695960.

The spelling of 31899853 in words is "thirty-one million, eight hundred ninety-nine thousand, eight hundred fifty-three".