90199111 has 4 divisors (see below), whose sum is σ = 90235072. Its totient is φ = 90163152.

The previous prime is 90199091. The next prime is 90199117. The reversal of 90199111 is 11199109.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11199109 = 41 ⋅273149.

It is a cyclic number.

It is not a de Polignac number, because 90199111 - 2⁹ = 90198599 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 (90199117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13911 + ... + 19336.

It is an arithmetic number, because the mean of its divisors is an integer number (22558768).

Almost surely, 2^90199111 is an apocalyptic number.

90199111 is a deficient number, since it is larger than the sum of its proper divisors (35961).

90199111 is a wasteful number, since it uses less digits than its factorization.

90199111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35960.

The product of its (nonzero) digits is 729, while the sum is 31.

The square root of 90199111 is about 9497.3212539115. The cubic root of 90199111 is about 448.4707116058.

The spelling of 90199111 in words is "ninety million, one hundred ninety-nine thousand, one hundred eleven".