72536279 has 4 divisors (see below), whose sum is σ = 75037560. Its totient is φ = 70035000.

The previous prime is 72536251. The next prime is 72536291. The reversal of 72536279 is 97263527.

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

It is a de Polignac number, because none of the positive numbers 2^k-72536279 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72536209) 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, 1250597 + ... + 1250654.

It is an arithmetic number, because the mean of its divisors is an integer number (18759390).

Almost surely, 2^72536279 is an apocalyptic number.

72536279 is a deficient number, since it is larger than the sum of its proper divisors (2501281).

72536279 is a wasteful number, since it uses less digits than its factorization.

72536279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2501280.

The product of its digits is 158760, while the sum is 41.

The square root of 72536279 is about 8516.8232927542. The cubic root of 72536279 is about 417.0470860267.

The spelling of 72536279 in words is "seventy-two million, five hundred thirty-six thousand, two hundred seventy-nine".