72828529 has 2 divisors, whose sum is σ = 72828530. Its totient is φ = 72828528.

The previous prime is 72828487. The next prime is 72828583. The reversal of 72828529 is 92582827.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 52533504 + 20295025 = 7248^2 + 4505^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72828529 is a prime.

It is not a weakly prime, because it can be changed into another prime (72828589) 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, 36414264 + 36414265.

It is an arithmetic number, because the mean of its divisors is an integer number (36414265).

Almost surely, 2^72828529 is an apocalyptic number.

It is an amenable number.

72828529 is a deficient number, since it is larger than the sum of its proper divisors (1).

72828529 is an equidigital number, since it uses as much as digits as its factorization.

72828529 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 161280, while the sum is 43.

The square root of 72828529 is about 8533.9632645096. The cubic root of 72828529 is about 417.6064322817.

The spelling of 72828529 in words is "seventy-two million, eight hundred twenty-eight thousand, five hundred twenty-nine".