99890593 has 4 divisors (see below), whose sum is σ = 108971568. Its totient is φ = 90809620.

The previous prime is 99890579. The next prime is 99890627. The reversal of 99890593 is 39509899.

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 not a de Polignac number, because 99890593 - 2¹³ = 99882401 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 99890593.

It is not an unprimeable number, because it can be changed into a prime (99890563) 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, 4540471 + ... + 4540492.

It is an arithmetic number, because the mean of its divisors is an integer number (27242892).

Almost surely, 2^99890593 is an apocalyptic number.

It is an amenable number.

99890593 is a deficient number, since it is larger than the sum of its proper divisors (9080975).

99890593 is a wasteful number, since it uses less digits than its factorization.

99890593 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9080974.

The product of its (nonzero) digits is 787320, while the sum is 52.

The square root of 99890593 is about 9994.5281529445. The cubic root of 99890593 is about 463.9895474880.

The spelling of 99890593 in words is "ninety-nine million, eight hundred ninety thousand, five hundred ninety-three".