31450613 has 2 divisors, whose sum is σ = 31450614. Its totient is φ = 31450612.

The previous prime is 31450603. The next prime is 31450619. The reversal of 31450613 is 31605413.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27478564 + 3972049 = 5242^2 + 1993^2 .

It is a cyclic number.

It is not a de Polignac number, because 31450613 - 2¹⁰ = 31449589 is a prime.

It is a Sophie Germain 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 (31450619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15725306 + 15725307.

It is an arithmetic number, because the mean of its divisors is an integer number (15725307).

Almost surely, 2^31450613 is an apocalyptic number.

It is an amenable number.

31450613 is a deficient number, since it is larger than the sum of its proper divisors (1).

31450613 is an equidigital number, since it uses as much as digits as its factorization.

31450613 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 31450613 is about 5608.0846106313. The cubic root of 31450613 is about 315.6528427289.

The spelling of 31450613 in words is "thirty-one million, four hundred fifty thousand, six hundred thirteen".