73112813 has 2 divisors, whose sum is σ = 73112814. Its totient is φ = 73112812.

The previous prime is 73112797. The next prime is 73112821. The reversal of 73112813 is 31821137.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 72216004 + 896809 = 8498^2 + 947^2 .

It is a cyclic number.

It is not a de Polignac number, because 73112813 - 2⁴ = 73112797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (73112833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36556406 + 36556407.

It is an arithmetic number, because the mean of its divisors is an integer number (36556407).

Almost surely, 2^73112813 is an apocalyptic number.

It is an amenable number.

73112813 is a deficient number, since it is larger than the sum of its proper divisors (1).

73112813 is an equidigital number, since it uses as much as digits as its factorization.

73112813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1008, while the sum is 26.

The square root of 73112813 is about 8550.6030781460. The cubic root of 73112813 is about 418.1490982348.

The spelling of 73112813 in words is "seventy-three million, one hundred twelve thousand, eight hundred thirteen".