90610509 has 16 divisors (see below), whose sum is σ = 132644160. Its totient is φ = 54562560.

The previous prime is 90610477. The next prime is 90610517. The reversal of 90610509 is 90501609.

It is not a de Polignac number, because 90610509 - 2⁵ = 90610477 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90610579) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3564 + ... + 13925.

It is an arithmetic number, because the mean of its divisors is an integer number (8290260).

Almost surely, 2^90610509 is an apocalyptic number.

It is an amenable number.

90610509 is a deficient number, since it is larger than the sum of its proper divisors (42033651).

90610509 is a wasteful number, since it uses less digits than its factorization.

90610509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17660.

The product of its (nonzero) digits is 2430, while the sum is 30.

The square root of 90610509 is about 9518.9552472947. The cubic root of 90610509 is about 449.1515023551.

Subtracting from 90610509 its reverse (90501609), we obtain a square (108900 = 330²).

It can be divided in two parts, 90610 and 509, that added together give a palindrome (91119).

The spelling of 90610509 in words is "ninety million, six hundred ten thousand, five hundred nine".