31948897 has 2 divisors, whose sum is σ = 31948898. Its totient is φ = 31948896.

The previous prime is 31948867. The next prime is 31948901. The reversal of 31948897 is 79884913.

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., 17272336 + 14676561 = 4156^2 + 3831^2 .

It is a cyclic number.

It is not a de Polignac number, because 31948897 - 2²³ = 23560289 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31948897.

It is not a weakly prime, because it can be changed into another prime (31948837) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15974448 + 15974449.

It is an arithmetic number, because the mean of its divisors is an integer number (15974449).

Almost surely, 2^31948897 is an apocalyptic number.

It is an amenable number.

31948897 is a deficient number, since it is larger than the sum of its proper divisors (1).

31948897 is an equidigital number, since it uses as much as digits as its factorization.

31948897 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 435456, while the sum is 49.

The square root of 31948897 is about 5652.3355349802. The cubic root of 31948897 is about 317.3111183585.

The spelling of 31948897 in words is "thirty-one million, nine hundred forty-eight thousand, eight hundred ninety-seven".