72559717 has 2 divisors, whose sum is σ = 72559718. Its totient is φ = 72559716.

The previous prime is 72559699. The next prime is 72559759. The reversal of 72559717 is 71795527.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64545156 + 8014561 = 8034^2 + 2831^2 .

It is an emirp because it is prime and its reverse (71795527) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 72559717 - 2¹⁹ = 72035429 is a prime.

It is a super-2 number, since 2×72559717² = 10529825062240178, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72599717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36279858 + 36279859.

It is an arithmetic number, because the mean of its divisors is an integer number (36279859).

Almost surely, 2^72559717 is an apocalyptic number.

It is an amenable number.

72559717 is a deficient number, since it is larger than the sum of its proper divisors (1).

72559717 is an equidigital number, since it uses as much as digits as its factorization.

72559717 is an evil number, because the sum of its binary digits is even.

The product of its digits is 154350, while the sum is 43.

The square root of 72559717 is about 8518.1991641426. The cubic root of 72559717 is about 417.0920000896.

The spelling of 72559717 in words is "seventy-two million, five hundred fifty-nine thousand, seven hundred seventeen".