72299789 has 2 divisors, whose sum is σ = 72299790. Its totient is φ = 72299788.

The previous prime is 72299779. The next prime is 72299849. The reversal of 72299789 is 98799227.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63329764 + 8970025 = 7958^2 + 2995^2 .

It is an emirp because it is prime and its reverse (98799227) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72299789 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 72299789.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72299729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36149894 + 36149895.

It is an arithmetic number, because the mean of its divisors is an integer number (36149895).

Almost surely, 2^72299789 is an apocalyptic number.

It is an amenable number.

72299789 is a deficient number, since it is larger than the sum of its proper divisors (1).

72299789 is an equidigital number, since it uses as much as digits as its factorization.

72299789 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1143072, while the sum is 53.

The square root of 72299789 is about 8502.9282603113. The cubic root of 72299789 is about 416.5933597612.

The spelling of 72299789 in words is "seventy-two million, two hundred ninety-nine thousand, seven hundred eighty-nine".