89986509 has 12 divisors (see below), whose sum is σ = 130357500. Its totient is φ = 59817024.

The previous prime is 89986471. The next prime is 89986517. The reversal of 89986509 is 90568998.

It can be written as a sum of positive squares in 2 ways, for example, as 54022500 + 35964009 = 7350^2 + 5997^2 .

It is not a de Polignac number, because 89986509 - 2⁷ = 89986381 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89986549) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11184 + ... + 17465.

It is an arithmetic number, because the mean of its divisors is an integer number (10863125).

Almost surely, 2^89986509 is an apocalyptic number.

It is an amenable number.

89986509 is a deficient number, since it is larger than the sum of its proper divisors (40370991).

89986509 is a wasteful number, since it uses less digits than its factorization.

89986509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29004 (or 29001 counting only the distinct ones).

The product of its (nonzero) digits is 1399680, while the sum is 54.

The square root of 89986509 is about 9486.1219157251. The cubic root of 89986509 is about 448.1180814510.

The spelling of 89986509 in words is "eighty-nine million, nine hundred eighty-six thousand, five hundred nine".