31965149 has 2 divisors, whose sum is σ = 31965150. Its totient is φ = 31965148.

The previous prime is 31965139. The next prime is 31965173. The reversal of 31965149 is 94156913.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31561924 + 403225 = 5618^2 + 635^2 .

It is a cyclic number.

It is not a de Polignac number, because 31965149 - 2⁸ = 31964893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31965139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15982574 + 15982575.

It is an arithmetic number, because the mean of its divisors is an integer number (15982575).

Almost surely, 2^31965149 is an apocalyptic number.

It is an amenable number.

31965149 is a deficient number, since it is larger than the sum of its proper divisors (1).

31965149 is an equidigital number, since it uses as much as digits as its factorization.

31965149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 29160, while the sum is 38.

The square root of 31965149 is about 5653.7729880143. The cubic root of 31965149 is about 317.3649132894.

The spelling of 31965149 in words is "thirty-one million, nine hundred sixty-five thousand, one hundred forty-nine".