72711889 has 2 divisors, whose sum is σ = 72711890. Its totient is φ = 72711888.

The previous prime is 72711883. The next prime is 72711893. The reversal of 72711889 is 98811727.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 57501889 + 15210000 = 7583^2 + 3900^2 .

It is a cyclic number.

It is not a de Polignac number, because 72711889 - 2¹¹ = 72709841 is a prime.

It is not a weakly prime, because it can be changed into another prime (72711883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36355944 + 36355945.

It is an arithmetic number, because the mean of its divisors is an integer number (36355945).

Almost surely, 2^72711889 is an apocalyptic number.

It is an amenable number.

72711889 is a deficient number, since it is larger than the sum of its proper divisors (1).

72711889 is an equidigital number, since it uses as much as digits as its factorization.

72711889 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 56448, while the sum is 43.

The square root of 72711889 is about 8527.1266555622. The cubic root of 72711889 is about 417.3833711542.

The spelling of 72711889 in words is "seventy-two million, seven hundred eleven thousand, eight hundred eighty-nine".