99945593 has 4 divisors (see below), whose sum is σ = 109031568. Its totient is φ = 90859620.

The previous prime is 99945589. The next prime is 99945607. The reversal of 99945593 is 39554999.

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, and also an emirpimes, since its reverse is a distinct semiprime: 39554999 = 11 ⋅3595909.

It is a cyclic number.

It is not a de Polignac number, because 99945593 - 2² = 99945589 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99945553) 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, 4542971 + ... + 4542992.

It is an arithmetic number, because the mean of its divisors is an integer number (27257892).

Almost surely, 2^99945593 is an apocalyptic number.

It is an amenable number.

99945593 is a deficient number, since it is larger than the sum of its proper divisors (9085975).

99945593 is a wasteful number, since it uses less digits than its factorization.

99945593 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9085974.

The product of its digits is 1968300, while the sum is 53.

The square root of 99945593 is about 9997.2792798841. The cubic root of 99945593 is about 464.0746897825.

The spelling of 99945593 in words is "ninety-nine million, nine hundred forty-five thousand, five hundred ninety-three".