72975293 has 4 divisors (see below), whose sum is σ = 73036668. Its totient is φ = 72913920.

The previous prime is 72975289. The next prime is 72975319. The reversal of 72975293 is 39257927.

It is a happy number.

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 36457444 + 36517849 = 6038^2 + 6043^2 .

It is a cyclic number.

It is not a de Polignac number, because 72975293 - 2² = 72975289 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 (72975593) 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, 28868 + ... + 31293.

It is an arithmetic number, because the mean of its divisors is an integer number (18259167).

Almost surely, 2^72975293 is an apocalyptic number.

It is an amenable number.

72975293 is a deficient number, since it is larger than the sum of its proper divisors (61375).

72975293 is a wasteful number, since it uses less digits than its factorization.

72975293 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61374.

The product of its digits is 238140, while the sum is 44.

The square root of 72975293 is about 8542.5577551457. The cubic root of 72975293 is about 417.8867641198.

The spelling of 72975293 in words is "seventy-two million, nine hundred seventy-five thousand, two hundred ninety-three".