99891793 has 4 divisors (see below), whose sum is σ = 99931968. Its totient is φ = 99851620.

The previous prime is 99891791. The next prime is 99891811. The reversal of 99891793 is 39719899.

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 99891793 - 2¹ = 99891791 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99891791) 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, 16093 + ... + 21418.

It is an arithmetic number, because the mean of its divisors is an integer number (24982992).

Almost surely, 2^99891793 is an apocalyptic number.

It is an amenable number.

99891793 is a deficient number, since it is larger than the sum of its proper divisors (40175).

99891793 is a wasteful number, since it uses less digits than its factorization.

99891793 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40174.

The product of its digits is 1102248, while the sum is 55.

The square root of 99891793 is about 9994.5881856133. The cubic root of 99891793 is about 463.9914054715.

The spelling of 99891793 in words is "ninety-nine million, eight hundred ninety-one thousand, seven hundred ninety-three".