72929789 has 2 divisors, whose sum is σ = 72929790. Its totient is φ = 72929788.

The previous prime is 72929783. The next prime is 72929821. The reversal of 72929789 is 98792927.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 44488900 + 28440889 = 6670^2 + 5333^2 .

It is an emirp because it is prime and its reverse (98792927) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 72929789 - 2²⁴ = 56152573 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 72929789.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72929783) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36464894 + 36464895.

It is an arithmetic number, because the mean of its divisors is an integer number (36464895).

Almost surely, 2^72929789 is an apocalyptic number.

It is an amenable number.

72929789 is a deficient number, since it is larger than the sum of its proper divisors (1).

72929789 is an equidigital number, since it uses as much as digits as its factorization.

72929789 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 72929789 is about 8539.8939688968. The cubic root of 72929789 is about 417.7998878073.

The spelling of 72929789 in words is "seventy-two million, nine hundred twenty-nine thousand, seven hundred eighty-nine".