31411613 has 2 divisors, whose sum is σ = 31411614. Its totient is φ = 31411612.

The previous prime is 31411561. The next prime is 31411619. The reversal of 31411613 is 31611413.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18292729 + 13118884 = 4277^2 + 3622^2 .

It is a cyclic number.

It is not a de Polignac number, because 31411613 - 2⁸ = 31411357 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31411619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15705806 + 15705807.

It is an arithmetic number, because the mean of its divisors is an integer number (15705807).

Almost surely, 2^31411613 is an apocalyptic number.

It is an amenable number.

31411613 is a deficient number, since it is larger than the sum of its proper divisors (1).

31411613 is an equidigital number, since it uses as much as digits as its factorization.

31411613 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 216, while the sum is 20.

The square root of 31411613 is about 5604.6064090175. The cubic root of 31411613 is about 315.5223147711.

The spelling of 31411613 in words is "thirty-one million, four hundred eleven thousand, six hundred thirteen".