913881613 has 2 divisors, whose sum is σ = 913881614. Its totient is φ = 913881612.

The previous prime is 913881607. The next prime is 913881641. The reversal of 913881613 is 316188319.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 468376164 + 445505449 = 21642^2 + 21107^2 .

It is an emirp because it is prime and its reverse (316188319) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-913881613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (913881313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 456940806 + 456940807.

It is an arithmetic number, because the mean of its divisors is an integer number (456940807).

Almost surely, 2^913881613 is an apocalyptic number.

It is an amenable number.

913881613 is a deficient number, since it is larger than the sum of its proper divisors (1).

913881613 is an equidigital number, since it uses as much as digits as its factorization.

913881613 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31104, while the sum is 40.

The square root of 913881613 is about 30230.4749053004. The cubic root of 913881613 is about 970.4279873482.

The spelling of 913881613 in words is "nine hundred thirteen million, eight hundred eighty-one thousand, six hundred thirteen".