73890613 has 2 divisors, whose sum is σ = 73890614. Its totient is φ = 73890612.

The previous prime is 73890599. The next prime is 73890617. The reversal of 73890613 is 31609837.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 73239364 + 651249 = 8558^2 + 807^2 .

It is a cyclic number.

It is not a de Polignac number, because 73890613 - 2⁹ = 73890101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (73890617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36945306 + 36945307.

It is an arithmetic number, because the mean of its divisors is an integer number (36945307).

Almost surely, 2^73890613 is an apocalyptic number.

It is an amenable number.

73890613 is a deficient number, since it is larger than the sum of its proper divisors (1).

73890613 is an equidigital number, since it uses as much as digits as its factorization.

73890613 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 73890613 is about 8595.9649254752. The cubic root of 73890613 is about 419.6266769571.

The spelling of 73890613 in words is "seventy-three million, eight hundred ninety thousand, six hundred thirteen".