99722593 has 4 divisors (see below), whose sum is σ = 99772420. Its totient is φ = 99672768.

The previous prime is 99722587. The next prime is 99722611. The reversal of 99722593 is 39522799.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 39522799 = 31 ⋅1274929.

It can be written as a sum of positive squares in 2 ways, for example, as 43652449 + 56070144 = 6607^2 + 7488^2 .

It is a cyclic number.

It is not a de Polignac number, because 99722593 - 2²⁵ = 66168161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99722533) 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, 21780 + ... + 25957.

It is an arithmetic number, because the mean of its divisors is an integer number (24943105).

Almost surely, 2^99722593 is an apocalyptic number.

It is an amenable number.

99722593 is a deficient number, since it is larger than the sum of its proper divisors (49827).

99722593 is a wasteful number, since it uses less digits than its factorization.

99722593 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49826.

The product of its digits is 306180, while the sum is 46.

The square root of 99722593 is about 9986.1200173040. The cubic root of 99722593 is about 463.7292827908.

The spelling of 99722593 in words is "ninety-nine million, seven hundred twenty-two thousand, five hundred ninety-three".