72975929 has 4 divisors (see below), whose sum is σ = 78589476. Its totient is φ = 67362384.

The previous prime is 72975923. The next prime is 72975961. The reversal of 72975929 is 92957927.

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 7689529 + 65286400 = 2773^2 + 8080^2 .

It is a cyclic number.

It is not a de Polignac number, because 72975929 - 2⁸ = 72975673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72975923) 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, 2806754 + ... + 2806779.

It is an arithmetic number, because the mean of its divisors is an integer number (19647369).

Almost surely, 2^72975929 is an apocalyptic number.

It is an amenable number.

72975929 is a deficient number, since it is larger than the sum of its proper divisors (5613547).

72975929 is a wasteful number, since it uses less digits than its factorization.

72975929 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5613546.

The product of its digits is 714420, while the sum is 50.

The square root of 72975929 is about 8542.5949804494. The cubic root of 72975929 is about 417.8879781161.

The spelling of 72975929 in words is "seventy-two million, nine hundred seventy-five thousand, nine hundred twenty-nine".