72302917 has 2 divisors, whose sum is σ = 72302918. Its totient is φ = 72302916.

The previous prime is 72302911. The next prime is 72302939. The reversal of 72302917 is 71920327.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40335201 + 31967716 = 6351^2 + 5654^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72302917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72302911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36151458 + 36151459.

It is an arithmetic number, because the mean of its divisors is an integer number (36151459).

Almost surely, 2^72302917 is an apocalyptic number.

It is an amenable number.

72302917 is a deficient number, since it is larger than the sum of its proper divisors (1).

72302917 is an equidigital number, since it uses as much as digits as its factorization.

72302917 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5292, while the sum is 31.

The square root of 72302917 is about 8503.1121949554. The cubic root of 72302917 is about 416.5993675484.

The spelling of 72302917 in words is "seventy-two million, three hundred two thousand, nine hundred seventeen".