90595561 has 8 divisors (see below), whose sum is σ = 105651200. Its totient is φ = 77653044.

The previous prime is 90595559. The next prime is 90595619. The reversal of 90595561 is 16559509.

90595561 is nontrivially palindromic in base 6.

It is not a de Polignac number, because 90595561 - 2¹ = 90595559 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90595511) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 131721 + ... + 132406.

It is an arithmetic number, because the mean of its divisors is an integer number (13206400).

Almost surely, 2^90595561 is an apocalyptic number.

It is an amenable number.

90595561 is a deficient number, since it is larger than the sum of its proper divisors (15055639).

90595561 is an equidigital number, since it uses as much as digits as its factorization.

90595561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264148 (or 264134 counting only the distinct ones).

The product of its (nonzero) digits is 60750, while the sum is 40.

The square root of 90595561 is about 9518.1700447092. The cubic root of 90595561 is about 449.1268021816.

The spelling of 90595561 in words is "ninety million, five hundred ninety-five thousand, five hundred sixty-one".