72369533 has 4 divisors (see below), whose sum is σ = 72788028. Its totient is φ = 71951040.

The previous prime is 72369503. The next prime is 72369547. The reversal of 72369533 is 33596327.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 33596327 = 191 ⋅175897.

It can be written as a sum of positive squares in 2 ways, for example, as 65723449 + 6646084 = 8107^2 + 2578^2 .

It is a cyclic number.

It is not a de Polignac number, because 72369533 - 2¹⁸ = 72107389 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 (72369503) 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, 208988 + ... + 209333.

It is an arithmetic number, because the mean of its divisors is an integer number (18197007).

Almost surely, 2^72369533 is an apocalyptic number.

It is an amenable number.

72369533 is a deficient number, since it is larger than the sum of its proper divisors (418495).

72369533 is a wasteful number, since it uses less digits than its factorization.

72369533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 418494.

The product of its digits is 102060, while the sum is 38.

The square root of 72369533 is about 8507.0284471136. The cubic root of 72369533 is about 416.7272723220.

The spelling of 72369533 in words is "seventy-two million, three hundred sixty-nine thousand, five hundred thirty-three".