90206887 has 8 divisors (see below), whose sum is σ = 90994176. Its totient is φ = 89422872.

The previous prime is 90206873. The next prime is 90206911. The reversal of 90206887 is 78860209.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 90206887 - 2²³ = 81818279 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 (90206827) 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 7 ways as a sum of consecutive naturals, for example, 121038 + ... + 121780.

It is an arithmetic number, because the mean of its divisors is an integer number (11374272).

Almost surely, 2^90206887 is an apocalyptic number.

90206887 is a deficient number, since it is larger than the sum of its proper divisors (787289).

90206887 is a wasteful number, since it uses less digits than its factorization.

90206887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1637.

The product of its (nonzero) digits is 48384, while the sum is 40.

The square root of 90206887 is about 9497.7306236806. The cubic root of 90206887 is about 448.4835986805.

The spelling of 90206887 in words is "ninety million, two hundred six thousand, eight hundred eighty-seven".