90143785 has 16 divisors (see below), whose sum is σ = 113186304. Its totient is φ = 68789952.

The previous prime is 90143777. The next prime is 90143839. The reversal of 90143785 is 58734109.

It is a cyclic number.

It is not a de Polignac number, because 90143785 - 2³ = 90143777 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52399 + ... + 54091.

It is an arithmetic number, because the mean of its divisors is an integer number (7074144).

Almost surely, 2^90143785 is an apocalyptic number.

It is an amenable number.

90143785 is a deficient number, since it is larger than the sum of its proper divisors (23042519).

90143785 is a wasteful number, since it uses less digits than its factorization.

90143785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2184.

The product of its (nonzero) digits is 30240, while the sum is 37.

The square root of 90143785 is about 9494.4080910818. The cubic root of 90143785 is about 448.3789990782.

The spelling of 90143785 in words is "ninety million, one hundred forty-three thousand, seven hundred eighty-five".