90865765 has 16 divisors (see below), whose sum is σ = 115940160. Its totient is φ = 68128000.

The previous prime is 90865763. The next prime is 90865769. The reversal of 90865765 is 56756809.

It is not a de Polignac number, because 90865765 - 2¹ = 90865763 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90865763) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19206 + ... + 23464.

It is an arithmetic number, because the mean of its divisors is an integer number (7246260).

Almost surely, 2^90865765 is an apocalyptic number.

It is an amenable number.

90865765 is a deficient number, since it is larger than the sum of its proper divisors (25074395).

90865765 is a wasteful number, since it uses less digits than its factorization.

90865765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4532.

The product of its (nonzero) digits is 453600, while the sum is 46.

The square root of 90865765 is about 9532.3535918471. The cubic root of 90865765 is about 449.5728704269.

The spelling of 90865765 in words is "ninety million, eight hundred sixty-five thousand, seven hundred sixty-five".