72717941 has 2 divisors, whose sum is σ = 72717942. Its totient is φ = 72717940.

The previous prime is 72717937. The next prime is 72717943. The reversal of 72717941 is 14971727.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 63138916 + 9579025 = 7946^2 + 3095^2 .

It is a cyclic number.

It is not a de Polignac number, because 72717941 - 2² = 72717937 is a prime.

Together with 72717943, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 72717895 and 72717904.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72717943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36358970 + 36358971.

It is an arithmetic number, because the mean of its divisors is an integer number (36358971).

Almost surely, 2^72717941 is an apocalyptic number.

It is an amenable number.

72717941 is a deficient number, since it is larger than the sum of its proper divisors (1).

72717941 is an equidigital number, since it uses as much as digits as its factorization.

72717941 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24696, while the sum is 38.

The square root of 72717941 is about 8527.4815156645. The cubic root of 72717941 is about 417.3949508014.

The spelling of 72717941 in words is "seventy-two million, seven hundred seventeen thousand, nine hundred forty-one".