90389665 has 16 divisors (see below), whose sum is σ = 112492800. Its totient is φ = 69641152.

The previous prime is 90389659. The next prime is 90389671. The reversal of 90389665 is 56698309.

It is an interprime number because it is at equal distance from previous prime (90389659) and next prime (90389671).

It is a cyclic number.

It is not a de Polignac number, because 90389665 - 2¹⁵ = 90356897 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 107316 + ... + 108154.

It is an arithmetic number, because the mean of its divisors is an integer number (7030800).

Almost surely, 2^90389665 is an apocalyptic number.

It is an amenable number.

90389665 is a deficient number, since it is larger than the sum of its proper divisors (22103135).

90389665 is a wasteful number, since it uses less digits than its factorization.

90389665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1616.

The product of its (nonzero) digits is 349920, while the sum is 46.

The square root of 90389665 is about 9507.3479477718. The cubic root of 90389665 is about 448.7863014837.

The spelling of 90389665 in words is "ninety million, three hundred eighty-nine thousand, six hundred sixty-five".