90086865 has 32 divisors (see below), whose sum is σ = 158716800. Its totient is φ = 43269120.

The previous prime is 90086863. The next prime is 90086879. The reversal of 90086865 is 56868009.

It is not a de Polignac number, because 90086865 - 2¹ = 90086863 is a prime.

It is a super-3 number, since 3×90086865³ (a number of 25 digits) contains 333 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (90086861) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15481 + ... + 20489.

It is an arithmetic number, because the mean of its divisors is an integer number (4959900).

Almost surely, 2^90086865 is an apocalyptic number.

It is an amenable number.

90086865 is a deficient number, since it is larger than the sum of its proper divisors (68629935).

90086865 is a wasteful number, since it uses less digits than its factorization.

90086865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5137.

The product of its (nonzero) digits is 103680, while the sum is 42.

The square root of 90086865 is about 9491.4100638419. The cubic root of 90086865 is about 448.2846050451.

It can be divided in two parts, 90086 and 865, that added together give a triangular number (90951 = T₄₂₆).

The spelling of 90086865 in words is "ninety million, eighty-six thousand, eight hundred sixty-five".