90199686 has 16 divisors (see below), whose sum is σ = 186620400. Its totient is φ = 29029728.

The previous prime is 90199679. The next prime is 90199687. The reversal of 90199686 is 68699109.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90199687) 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 7 ways as a sum of consecutive naturals, for example, 259021 + ... + 259368.

It is an arithmetic number, because the mean of its divisors is an integer number (11663775).

Almost surely, 2^90199686 is an apocalyptic number.

90199686 is an abundant number, since it is smaller than the sum of its proper divisors (96420714).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

90199686 is a wasteful number, since it uses less digits than its factorization.

90199686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 518423.

The product of its (nonzero) digits is 209952, while the sum is 48.

The square root of 90199686 is about 9497.3515255570. The cubic root of 90199686 is about 448.4716645720.

The spelling of 90199686 in words is "ninety million, one hundred ninety-nine thousand, six hundred eighty-six".