99125609 has 4 divisors (see below), whose sum is σ = 108137040. Its totient is φ = 90114180.

The previous prime is 99125597. The next prime is 99125617. The reversal of 99125609 is 90652199.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 99125609 - 2²⁴ = 82348393 is a prime.

It is not an unprimeable number, because it can be changed into a prime (99125669) 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 3 ways as a sum of consecutive naturals, for example, 4505699 + ... + 4505720.

It is an arithmetic number, because the mean of its divisors is an integer number (27034260).

Almost surely, 2^99125609 is an apocalyptic number.

It is an amenable number.

99125609 is a deficient number, since it is larger than the sum of its proper divisors (9011431).

99125609 is a wasteful number, since it uses less digits than its factorization.

99125609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9011430.

The product of its (nonzero) digits is 43740, while the sum is 41.

The square root of 99125609 is about 9956.1844599224. The cubic root of 99125609 is about 462.8020665146.

The spelling of 99125609 in words is "ninety-nine million, one hundred twenty-five thousand, six hundred nine".