31086901 has 2 divisors, whose sum is σ = 31086902. Its totient is φ = 31086900.

The previous prime is 31086877. The next prime is 31086911. The reversal of 31086901 is 10968013.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31024900 + 62001 = 5570^2 + 249^2 .

It is a cyclic number.

It is not a de Polignac number, because 31086901 - 2⁷ = 31086773 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31086901.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31086911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15543450 + 15543451.

It is an arithmetic number, because the mean of its divisors is an integer number (15543451).

Almost surely, 2^31086901 is an apocalyptic number.

It is an amenable number.

31086901 is a deficient number, since it is larger than the sum of its proper divisors (1).

31086901 is an equidigital number, since it uses as much as digits as its factorization.

31086901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 31086901 is about 5575.5628415434. The cubic root of 31086901 is about 314.4313280674.

The spelling of 31086901 in words is "thirty-one million, eighty-six thousand, nine hundred one".