90199139 has 4 divisors (see below), whose sum is σ = 92399160. Its totient is φ = 87999120.

The previous prime is 90199121. The next prime is 90199159. The reversal of 90199139 is 93199109.

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

It is not a de Polignac number, because 90199139 - 2⁸ = 90198883 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41), and also a Moran number because the ratio is a prime number: 2199979 = 90199139 / (9 + 0 + 1 + 9 + 9 + 1 + 3 + 9).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 90199096 and 90199105.

It is not an unprimeable number, because it can be changed into a prime (90199159) 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, 1099949 + ... + 1100030.

It is an arithmetic number, because the mean of its divisors is an integer number (23099790).

Almost surely, 2^90199139 is an apocalyptic number.

90199139 is a deficient number, since it is larger than the sum of its proper divisors (2200021).

90199139 is a wasteful number, since it uses less digits than its factorization.

90199139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2200020.

The product of its (nonzero) digits is 19683, while the sum is 41.

The square root of 90199139 is about 9497.3227280113. The cubic root of 90199139 is about 448.4707580112.

The spelling of 90199139 in words is "ninety million, one hundred ninety-nine thousand, one hundred thirty-nine".