72569533 has 4 divisors (see below), whose sum is σ = 72683388. Its totient is φ = 72455680.

The previous prime is 72569507. The next prime is 72569579. The reversal of 72569533 is 33596527.

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

It can be written as a sum of positive squares in 2 ways, for example, as 40284409 + 32285124 = 6347^2 + 5682^2 .

It is a cyclic number.

It is not a de Polignac number, because 72569533 - 2¹³ = 72561341 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 (72569503) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55966 + ... + 57247.

It is an arithmetic number, because the mean of its divisors is an integer number (18170847).

Almost surely, 2^72569533 is an apocalyptic number.

It is an amenable number.

72569533 is a deficient number, since it is larger than the sum of its proper divisors (113855).

72569533 is a wasteful number, since it uses less digits than its factorization.

72569533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113854.

The product of its digits is 170100, while the sum is 40.

The square root of 72569533 is about 8518.7753227797. The cubic root of 72569533 is about 417.1108075429.

The spelling of 72569533 in words is "seventy-two million, five hundred sixty-nine thousand, five hundred thirty-three".