72533539 has 8 divisors (see below), whose sum is σ = 78186752. Its totient is φ = 66890880.

The previous prime is 72533497. The next prime is 72533557. The reversal of 72533539 is 93533527.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 72533539 - 2⁷ = 72533411 is a prime.

It is a super-2 number, since 2×72533539² = 10522228559729042, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 72533498 and 72533507.

It is not an unprimeable number, because it can be changed into a prime (72533569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17227 + ... + 21019.

It is an arithmetic number, because the mean of its divisors is an integer number (9773344).

Almost surely, 2^72533539 is an apocalyptic number.

72533539 is a deficient number, since it is larger than the sum of its proper divisors (5653213).

72533539 is a wasteful number, since it uses less digits than its factorization.

72533539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5277.

The product of its digits is 85050, while the sum is 37.

The square root of 72533539 is about 8516.6624331366. The cubic root of 72533539 is about 417.0418347538.

The spelling of 72533539 in words is "seventy-two million, five hundred thirty-three thousand, five hundred thirty-nine".