72530579 has 4 divisors (see below), whose sum is σ = 79124280. Its totient is φ = 65936880.

The previous prime is 72530573. The next prime is 72530587. The reversal of 72530579 is 97503527.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 72530579 - 2²⁰ = 71482003 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72530573) 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 in 3 ways as a sum of consecutive naturals, for example, 3296834 + ... + 3296855.

It is an arithmetic number, because the mean of its divisors is an integer number (19781070).

Almost surely, 2^72530579 is an apocalyptic number.

72530579 is a deficient number, since it is larger than the sum of its proper divisors (6593701).

72530579 is a wasteful number, since it uses less digits than its factorization.

72530579 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6593700.

The product of its (nonzero) digits is 66150, while the sum is 38.

The square root of 72530579 is about 8516.4886543692. The cubic root of 72530579 is about 417.0361616971.

The spelling of 72530579 in words is "seventy-two million, five hundred thirty thousand, five hundred seventy-nine".