90349889 has 16 divisors (see below), whose sum is σ = 104659200. Its totient is φ = 76400064.

The previous prime is 90349879. The next prime is 90349927. The reversal of 90349889 is 98894309.

It is a cyclic number.

It is not a de Polignac number, because 90349889 - 2⁴ = 90349873 is a prime.

It is a Smith number, since the sum of its digits (50) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90349879) 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, 251492 + ... + 251850.

It is an arithmetic number, because the mean of its divisors is an integer number (6541200).

Almost surely, 2^90349889 is an apocalyptic number.

It is an amenable number.

90349889 is a deficient number, since it is larger than the sum of its proper divisors (14309311).

90349889 is a wasteful number, since it uses less digits than its factorization.

90349889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 752.

The product of its (nonzero) digits is 559872, while the sum is 50.

The square root of 90349889 is about 9505.2558618903. The cubic root of 90349889 is about 448.7204623084.

The spelling of 90349889 in words is "ninety million, three hundred forty-nine thousand, eight hundred eighty-nine".