90199893 has 16 divisors (see below), whose sum is σ = 137599616. Its totient is φ = 51485760.

The previous prime is 90199871. The next prime is 90199913. The reversal of 90199893 is 39899109.

It is not a de Polignac number, because 90199893 - 2¹⁰ = 90198869 is a prime.

It is a super-2 number, since 2×90199893² = 16272041394422898, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90199843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23703 + ... + 27243.

It is an arithmetic number, because the mean of its divisors is an integer number (8599976).

Almost surely, 2^90199893 is an apocalyptic number.

It is an amenable number.

90199893 is a deficient number, since it is larger than the sum of its proper divisors (47399723).

90199893 is a wasteful number, since it uses less digits than its factorization.

90199893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4764.

The product of its (nonzero) digits is 157464, while the sum is 48.

The square root of 90199893 is about 9497.3624233258. The cubic root of 90199893 is about 448.4720076389.

The spelling of 90199893 in words is "ninety million, one hundred ninety-nine thousand, eight hundred ninety-three".