99992609 has 16 divisors (see below), whose sum is σ = 107075520. Its totient is φ = 93213120.

The previous prime is 99992539. The next prime is 99992617. The reversal of 99992609 is 90629999.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99992609 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (53).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99992209) 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 15 ways as a sum of consecutive naturals, for example, 102494 + ... + 103464.

It is an arithmetic number, because the mean of its divisors is an integer number (6692220).

Almost surely, 2^99992609 is an apocalyptic number.

It is an amenable number.

99992609 is a deficient number, since it is larger than the sum of its proper divisors (7082911).

99992609 is a wasteful number, since it uses less digits than its factorization.

99992609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1120.

The product of its (nonzero) digits is 708588, while the sum is 53.

The square root of 99992609 is about 9999.6304431714. The cubic root of 99992609 is about 464.1474477518.

99992609 divided by its sum of digits (53) gives a triangular number (1886653 = T₁₉₄₂).

The spelling of 99992609 in words is "ninety-nine million, nine hundred ninety-two thousand, six hundred nine".