31353649 has 2 divisors, whose sum is σ = 31353650. Its totient is φ = 31353648.

The previous prime is 31353613. The next prime is 31353659. The reversal of 31353649 is 94635313.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19963024 + 11390625 = 4468^2 + 3375^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31353649 is a prime.

It is not a weakly prime, because it can be changed into another prime (31353659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15676824 + 15676825.

It is an arithmetic number, because the mean of its divisors is an integer number (15676825).

Almost surely, 2^31353649 is an apocalyptic number.

It is an amenable number.

31353649 is a deficient number, since it is larger than the sum of its proper divisors (1).

31353649 is an equidigital number, since it uses as much as digits as its factorization.

31353649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 29160, while the sum is 34.

The square root of 31353649 is about 5599.4329177159. The cubic root of 31353649 is about 315.3281169909.

The spelling of 31353649 in words is "thirty-one million, three hundred fifty-three thousand, six hundred forty-nine".