31441649 has 2 divisors, whose sum is σ = 31441650. Its totient is φ = 31441648.

The previous prime is 31441639. The next prime is 31441651. The reversal of 31441649 is 94614413.

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., 31281649 + 160000 = 5593^2 + 400^2 .

It is a cyclic number.

It is not a de Polignac number, because 31441649 - 2⁸ = 31441393 is a prime.

Together with 31441651, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (31441609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15720824 + 15720825.

It is an arithmetic number, because the mean of its divisors is an integer number (15720825).

Almost surely, 2^31441649 is an apocalyptic number.

It is an amenable number.

31441649 is a deficient number, since it is larger than the sum of its proper divisors (1).

31441649 is an equidigital number, since it uses as much as digits as its factorization.

31441649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10368, while the sum is 32.

The square root of 31441649 is about 5607.2853503277. The cubic root of 31441649 is about 315.6228509346.

The spelling of 31441649 in words is "thirty-one million, four hundred forty-one thousand, six hundred forty-nine".