72990323 has 4 divisors (see below), whose sum is σ = 83417520. Its totient is φ = 62563128.

The previous prime is 72990319. The next prime is 72990341. The reversal of 72990323 is 32309927.

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

It is a cyclic number.

It is not a de Polignac number, because 72990323 - 2² = 72990319 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72990383) 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, 5213588 + ... + 5213601.

It is an arithmetic number, because the mean of its divisors is an integer number (20854380).

Almost surely, 2^72990323 is an apocalyptic number.

72990323 is a deficient number, since it is larger than the sum of its proper divisors (10427197).

72990323 is a wasteful number, since it uses less digits than its factorization.

72990323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10427196.

The product of its (nonzero) digits is 20412, while the sum is 35.

The square root of 72990323 is about 8543.4374229580. The cubic root of 72990323 is about 417.9154514862.

The spelling of 72990323 in words is "seventy-two million, nine hundred ninety thousand, three hundred twenty-three".