31602661 has 2 divisors, whose sum is σ = 31602662. Its totient is φ = 31602660.

The previous prime is 31602647. The next prime is 31602673. The reversal of 31602661 is 16620613.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26718561 + 4884100 = 5169^2 + 2210^2 .

It is a cyclic number.

It is not a de Polignac number, because 31602661 - 2¹⁹ = 31078373 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31602631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15801330 + 15801331.

It is an arithmetic number, because the mean of its divisors is an integer number (15801331).

Almost surely, 2^31602661 is an apocalyptic number.

It is an amenable number.

31602661 is a deficient number, since it is larger than the sum of its proper divisors (1).

31602661 is an equidigital number, since it uses as much as digits as its factorization.

31602661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 31602661 is about 5621.6244093678. The cubic root of 31602661 is about 316.1606997887.

The spelling of 31602661 in words is "thirty-one million, six hundred two thousand, six hundred sixty-one".