89437509 has 12 divisors (see below), whose sum is σ = 147642976. Its totient is φ = 51107112.

The previous prime is 89437489. The next prime is 89437531. The reversal of 89437509 is 90573498.

It is not a de Polignac number, because 89437509 - 2⁸ = 89437253 is a prime.

It is a super-2 number, since 2×89437509² = 15998136032250162, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89437609) 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 11 ways as a sum of consecutive naturals, for example, 709759 + ... + 709884.

Almost surely, 2^89437509 is an apocalyptic number.

It is an amenable number.

89437509 is a deficient number, since it is larger than the sum of its proper divisors (58205467).

89437509 is a wasteful number, since it uses less digits than its factorization.

89437509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1419656 (or 1419653 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 45.

The square root of 89437509 is about 9457.1406355198. The cubic root of 89437509 is about 447.2049118314.

The spelling of 89437509 in words is "eighty-nine million, four hundred thirty-seven thousand, five hundred nine".