90006861 has 16 divisors (see below), whose sum is σ = 137314304. Its totient is φ = 51372144.

The previous prime is 90006817. The next prime is 90006863. The reversal of 90006861 is 16860009.

It is not a de Polignac number, because 90006861 - 2¹⁹ = 89482573 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90006863) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20856 + ... + 24798.

It is an arithmetic number, because the mean of its divisors is an integer number (8582144).

Almost surely, 2^90006861 is an apocalyptic number.

It is an amenable number.

90006861 is a deficient number, since it is larger than the sum of its proper divisors (47307443).

90006861 is a wasteful number, since it uses less digits than its factorization.

90006861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5040.

The product of its (nonzero) digits is 2592, while the sum is 30.

The square root of 90006861 is about 9487.1945800642. The cubic root of 90006861 is about 448.1518621137.

The spelling of 90006861 in words is "ninety million, six thousand, eight hundred sixty-one".