72904063 has 2 divisors, whose sum is σ = 72904064. Its totient is φ = 72904062.

The previous prime is 72904021. The next prime is 72904093. The reversal of 72904063 is 36040927.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72904063 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72904093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36452031 + 36452032.

It is an arithmetic number, because the mean of its divisors is an integer number (36452032).

Almost surely, 2^72904063 is an apocalyptic number.

72904063 is a deficient number, since it is larger than the sum of its proper divisors (1).

72904063 is an equidigital number, since it uses as much as digits as its factorization.

72904063 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9072, while the sum is 31.

The square root of 72904063 is about 8538.3876112531. The cubic root of 72904063 is about 417.7507556939.

The spelling of 72904063 in words is "seventy-two million, nine hundred four thousand, sixty-three".