72374917 has 2 divisors, whose sum is σ = 72374918. Its totient is φ = 72374916.

The previous prime is 72374903. The next prime is 72374927. The reversal of 72374917 is 71947327.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 69655716 + 2719201 = 8346^2 + 1649^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72374917 is a prime.

It is a super-2 number, since 2×72374917² = 10476257221513778, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 72374917.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72374927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36187458 + 36187459.

It is an arithmetic number, because the mean of its divisors is an integer number (36187459).

Almost surely, 2^72374917 is an apocalyptic number.

It is an amenable number.

72374917 is a deficient number, since it is larger than the sum of its proper divisors (1).

72374917 is an equidigital number, since it uses as much as digits as its factorization.

72374917 is an evil number, because the sum of its binary digits is even.

The product of its digits is 74088, while the sum is 40.

The square root of 72374917 is about 8507.3448854505. The cubic root of 72374917 is about 416.7376063392.

The spelling of 72374917 in words is "seventy-two million, three hundred seventy-four thousand, nine hundred seventeen".