73718573 has 2 divisors, whose sum is σ = 73718574. Its totient is φ = 73718572.

The previous prime is 73718509. The next prime is 73718591. The reversal of 73718573 is 37581737.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 56595529 + 17123044 = 7523^2 + 4138^2 .

It is an emirp because it is prime and its reverse (37581737) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 73718573 - 2⁶ = 73718509 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 73718573.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (73718503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36859286 + 36859287.

It is an arithmetic number, because the mean of its divisors is an integer number (36859287).

Almost surely, 2^73718573 is an apocalyptic number.

It is an amenable number.

73718573 is a deficient number, since it is larger than the sum of its proper divisors (1).

73718573 is an equidigital number, since it uses as much as digits as its factorization.

73718573 is an evil number, because the sum of its binary digits is even.

The product of its digits is 123480, while the sum is 41.

The square root of 73718573 is about 8585.9520730086. The cubic root of 73718573 is about 419.3007506905.

The spelling of 73718573 in words is "seventy-three million, seven hundred eighteen thousand, five hundred seventy-three".