72735293 has 4 divisors (see below), whose sum is σ = 72757728. Its totient is φ = 72712860.

The previous prime is 72735263. The next prime is 72735301. The reversal of 72735293 is 39253727.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 72735293 - 2¹⁶ = 72669757 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72735233) 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, 5321 + ... + 13182.

It is an arithmetic number, because the mean of its divisors is an integer number (18189432).

Almost surely, 2^72735293 is an apocalyptic number.

It is an amenable number.

72735293 is a deficient number, since it is larger than the sum of its proper divisors (22435).

72735293 is a wasteful number, since it uses less digits than its factorization.

72735293 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22434.

The product of its digits is 79380, while the sum is 38.

The square root of 72735293 is about 8528.4988714310. The cubic root of 72735293 is about 417.4281478414.

The spelling of 72735293 in words is "seventy-two million, seven hundred thirty-five thousand, two hundred ninety-three".