90830987 has 16 divisors (see below), whose sum is σ = 101787840. Its totient is φ = 80476032.

The previous prime is 90830981. The next prime is 90830989. The reversal of 90830987 is 78903809.

It is not a de Polignac number, because 90830987 - 2¹² = 90826891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90830981) 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, 73658 + ... + 74880.

It is an arithmetic number, because the mean of its divisors is an integer number (6361740).

Almost surely, 2^90830987 is an apocalyptic number.

90830987 is a deficient number, since it is larger than the sum of its proper divisors (10956853).

90830987 is a wasteful number, since it uses less digits than its factorization.

90830987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1462.

The product of its (nonzero) digits is 108864, while the sum is 44.

The square root of 90830987 is about 9530.5292088110. The cubic root of 90830987 is about 449.5155065398.

The spelling of 90830987 in words is "ninety million, eight hundred thirty thousand, nine hundred eighty-seven".