99890911 has 4 divisors (see below), whose sum is σ = 99912424. Its totient is φ = 99869400.

The previous prime is 99890893. The next prime is 99890927. The reversal of 99890911 is 11909899.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 99890911 - 2¹³ = 99882719 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99890951) 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, 585 + ... + 14146.

It is an arithmetic number, because the mean of its divisors is an integer number (24978106).

Almost surely, 2^99890911 is an apocalyptic number.

99890911 is a deficient number, since it is larger than the sum of its proper divisors (21513).

99890911 is a wasteful number, since it uses less digits than its factorization.

99890911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21512.

The product of its (nonzero) digits is 52488, while the sum is 46.

The square root of 99890911 is about 9994.5440616368. The cubic root of 99890911 is about 463.9900398551.

The spelling of 99890911 in words is "ninety-nine million, eight hundred ninety thousand, nine hundred eleven".