90039565 has 32 divisors (see below), whose sum is σ = 142642944. Its totient is φ = 52823040.

The previous prime is 90039541. The next prime is 90039569. The reversal of 90039565 is 56593009.

It is not a de Polignac number, because 90039565 - 2¹⁷ = 89908493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90039569) 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, 334 + ... + 13423.

It is an arithmetic number, because the mean of its divisors is an integer number (4457592).

Almost surely, 2^90039565 is an apocalyptic number.

It is an amenable number.

90039565 is a deficient number, since it is larger than the sum of its proper divisors (52603379).

90039565 is a wasteful number, since it uses less digits than its factorization.

90039565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13797.

The product of its (nonzero) digits is 36450, while the sum is 37.

The square root of 90039565 is about 9488.9180099735. The cubic root of 90039565 is about 448.2061342124.

The spelling of 90039565 in words is "ninety million, thirty-nine thousand, five hundred sixty-five".