90866187 has 6 divisors (see below), whose sum is σ = 131251172. Its totient is φ = 60577452.

The previous prime is 90866183. The next prime is 90866197. The reversal of 90866187 is 78166809.

It is a happy number.

It is not a de Polignac number, because 90866187 - 2² = 90866183 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90866183) 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 5 ways as a sum of consecutive naturals, for example, 5048113 + ... + 5048130.

Almost surely, 2^90866187 is an apocalyptic number.

90866187 is a deficient number, since it is larger than the sum of its proper divisors (40384985).

90866187 is a wasteful number, since it uses less digits than its factorization.

90866187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10096249 (or 10096246 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 45.

The square root of 90866187 is about 9532.3757269633. The cubic root of 90866187 is about 449.5735663966.

The spelling of 90866187 in words is "ninety million, eight hundred sixty-six thousand, one hundred eighty-seven".