99722993 has 4 divisors (see below), whose sum is σ = 99846768. Its totient is φ = 99599220.

The previous prime is 99722981. The next prime is 99722999. The reversal of 99722993 is 39922799.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 99722993 - 2¹⁰ = 99721969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99722999) 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, 60671 + ... + 62292.

It is an arithmetic number, because the mean of its divisors is an integer number (24961692).

Almost surely, 2^99722993 is an apocalyptic number.

It is an amenable number.

99722993 is a deficient number, since it is larger than the sum of its proper divisors (123775).

99722993 is a wasteful number, since it uses less digits than its factorization.

99722993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123774.

The product of its digits is 551124, while the sum is 50.

The square root of 99722993 is about 9986.1400450825. The cubic root of 99722993 is about 463.7299028157.

The spelling of 99722993 in words is "ninety-nine million, seven hundred twenty-two thousand, nine hundred ninety-three".