72722569 has 2 divisors, whose sum is σ = 72722570. Its totient is φ = 72722568.

The previous prime is 72722563. The next prime is 72722591. The reversal of 72722569 is 96522727.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 57198969 + 15523600 = 7563^2 + 3940^2 .

It is a cyclic number.

It is not a de Polignac number, because 72722569 - 2¹⁹ = 72198281 is a prime.

It is a super-2 number, since 2×72722569² = 10577144083919522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (72722563) 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, 36361284 + 36361285.

It is an arithmetic number, because the mean of its divisors is an integer number (36361285).

Almost surely, 2^72722569 is an apocalyptic number.

It is an amenable number.

72722569 is a deficient number, since it is larger than the sum of its proper divisors (1).

72722569 is an equidigital number, since it uses as much as digits as its factorization.

72722569 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 105840, while the sum is 40.

The square root of 72722569 is about 8527.7528693085. The cubic root of 72722569 is about 417.4038053923.

The spelling of 72722569 in words is "seventy-two million, seven hundred twenty-two thousand, five hundred sixty-nine".