72763993 has 2 divisors, whose sum is σ = 72763994. Its totient is φ = 72763992.

The previous prime is 72763979. The next prime is 72764017. The reversal of 72763993 is 39936727.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51308569 + 21455424 = 7163^2 + 4632^2 .

It is a cyclic number.

It is not a de Polignac number, because 72763993 - 2²⁵ = 39209561 is a prime.

It is not a weakly prime, because it can be changed into another prime (72763903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36381996 + 36381997.

It is an arithmetic number, because the mean of its divisors is an integer number (36381997).

Almost surely, 2^72763993 is an apocalyptic number.

It is an amenable number.

72763993 is a deficient number, since it is larger than the sum of its proper divisors (1).

72763993 is an equidigital number, since it uses as much as digits as its factorization.

72763993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 428652, while the sum is 46.

The square root of 72763993 is about 8530.1812993629. The cubic root of 72763993 is about 417.4830437614.

The spelling of 72763993 in words is "seventy-two million, seven hundred sixty-three thousand, nine hundred ninety-three".