73311613 has 2 divisors, whose sum is σ = 73311614. Its totient is φ = 73311612.

The previous prime is 73311607. The next prime is 73311617. The reversal of 73311613 is 31611337.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54804409 + 18507204 = 7403^2 + 4302^2 .

It is a cyclic number.

It is not a de Polignac number, because 73311613 - 2²¹ = 71214461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (73311617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36655806 + 36655807.

It is an arithmetic number, because the mean of its divisors is an integer number (36655807).

Almost surely, 2^73311613 is an apocalyptic number.

It is an amenable number.

73311613 is a deficient number, since it is larger than the sum of its proper divisors (1).

73311613 is an equidigital number, since it uses as much as digits as its factorization.

73311613 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1134, while the sum is 25.

The square root of 73311613 is about 8562.2200976149. The cubic root of 73311613 is about 418.5277496496.

The spelling of 73311613 in words is "seventy-three million, three hundred eleven thousand, six hundred thirteen".