72930917 has 2 divisors, whose sum is σ = 72930918. Its totient is φ = 72930916.

The previous prime is 72930899. The next prime is 72930931. The reversal of 72930917 is 71903927.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 72829156 + 101761 = 8534^2 + 319^2 .

It is a cyclic number.

It is not a de Polignac number, because 72930917 - 2²⁴ = 56153701 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72930617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36465458 + 36465459.

It is an arithmetic number, because the mean of its divisors is an integer number (36465459).

Almost surely, 2^72930917 is an apocalyptic number.

It is an amenable number.

72930917 is a deficient number, since it is larger than the sum of its proper divisors (1).

72930917 is an equidigital number, since it uses as much as digits as its factorization.

72930917 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23814, while the sum is 38.

The square root of 72930917 is about 8539.9600116160. The cubic root of 72930917 is about 417.8020418235.

The spelling of 72930917 in words is "seventy-two million, nine hundred thirty thousand, nine hundred seventeen".