31613669 has 2 divisors, whose sum is σ = 31613670. Its totient is φ = 31613668.

The previous prime is 31613639. The next prime is 31613717. The reversal of 31613669 is 96631613.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17960644 + 13653025 = 4238^2 + 3695^2 .

It is a cyclic number.

It is not a de Polignac number, because 31613669 - 2¹⁶ = 31548133 is a prime.

It is a super-2 number, since 2×31613669² = 1998848135283122, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31613629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15806834 + 15806835.

It is an arithmetic number, because the mean of its divisors is an integer number (15806835).

Almost surely, 2^31613669 is an apocalyptic number.

It is an amenable number.

31613669 is a deficient number, since it is larger than the sum of its proper divisors (1).

31613669 is an equidigital number, since it uses as much as digits as its factorization.

31613669 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17496, while the sum is 35.

The square root of 31613669 is about 5622.6034005610. The cubic root of 31613669 is about 316.1974044296.

The spelling of 31613669 in words is "thirty-one million, six hundred thirteen thousand, six hundred sixty-nine".