90430985 has 16 divisors (see below), whose sum is σ = 111476736. Its totient is φ = 70394688.

The previous prime is 90430981. The next prime is 90430987. The reversal of 90430985 is 58903409.

It is a cyclic number.

It is not a de Polignac number, because 90430985 - 2² = 90430981 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (90430981) 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, 32312 + ... + 34998.

It is an arithmetic number, because the mean of its divisors is an integer number (6967296).

Almost surely, 2^90430985 is an apocalyptic number.

It is an amenable number.

90430985 is a deficient number, since it is larger than the sum of its proper divisors (21045751).

90430985 is a wasteful number, since it uses less digits than its factorization.

90430985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2872.

The product of its (nonzero) digits is 38880, while the sum is 38.

The square root of 90430985 is about 9509.5207555376. The cubic root of 90430985 is about 448.8546759121.

The spelling of 90430985 in words is "ninety million, four hundred thirty thousand, nine hundred eighty-five".