89725909 has 24 divisors (see below), whose sum is σ = 113890560. Its totient is φ = 70053984.

The previous prime is 89725891. The next prime is 89725919. The reversal of 89725909 is 90952798.

It is not a de Polignac number, because 89725909 - 2⁵ = 89725877 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89725919) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 49432 + ... + 51214.

It is an arithmetic number, because the mean of its divisors is an integer number (4745440).

Almost surely, 2^89725909 is an apocalyptic number.

It is an amenable number.

89725909 is a deficient number, since it is larger than the sum of its proper divisors (24164651).

89725909 is a wasteful number, since it uses less digits than its factorization.

89725909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1889 (or 1882 counting only the distinct ones).

The product of its (nonzero) digits is 408240, while the sum is 49.

The square root of 89725909 is about 9472.3761010636. The cubic root of 89725909 is about 447.6850814163.

The spelling of 89725909 in words is "eighty-nine million, seven hundred twenty-five thousand, nine hundred nine".