72728699 has 2 divisors, whose sum is σ = 72728700. Its totient is φ = 72728698.

The previous prime is 72728683. The next prime is 72728707. The reversal of 72728699 is 99682727.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (99682727) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 72728699 - 2⁴ = 72728683 is a prime.

It is not a weakly prime, because it can be changed into another prime (72728099) 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, 36364349 + 36364350.

It is an arithmetic number, because the mean of its divisors is an integer number (36364350).

Almost surely, 2^72728699 is an apocalyptic number.

72728699 is a deficient number, since it is larger than the sum of its proper divisors (1).

72728699 is an equidigital number, since it uses as much as digits as its factorization.

72728699 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 762048, while the sum is 50.

The square root of 72728699 is about 8528.1122764654. The cubic root of 72728699 is about 417.4155331291.

The spelling of 72728699 in words is "seventy-two million, seven hundred twenty-eight thousand, six hundred ninety-nine".