73131323 has 4 divisors (see below), whose sum is σ = 76980360. Its totient is φ = 69282288.

The previous prime is 73131319. The next prime is 73131337. The reversal of 73131323 is 32313137.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32313137 = 23 ⋅1404919.

It is a cyclic number.

It is not a de Polignac number, because 73131323 - 2² = 73131319 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73131343) 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, 1924490 + ... + 1924527.

It is an arithmetic number, because the mean of its divisors is an integer number (19245090).

Almost surely, 2^73131323 is an apocalyptic number.

73131323 is a deficient number, since it is larger than the sum of its proper divisors (3849037).

73131323 is a wasteful number, since it uses less digits than its factorization.

73131323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3849036.

The product of its digits is 1134, while the sum is 23.

The square root of 73131323 is about 8551.6853894422. The cubic root of 73131323 is about 418.1843829152.

The spelling of 73131323 in words is "seventy-three million, one hundred thirty-one thousand, three hundred twenty-three".