99685579 has 4 divisors (see below), whose sum is σ = 113926384. Its totient is φ = 85444776.

The previous prime is 99685577. The next prime is 99685583. The reversal of 99685579 is 97558699.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 99685579 - 2¹ = 99685577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99685577) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7120392 + ... + 7120405.

It is an arithmetic number, because the mean of its divisors is an integer number (28481596).

Almost surely, 2^99685579 is an apocalyptic number.

99685579 is a deficient number, since it is larger than the sum of its proper divisors (14240805).

99685579 is a wasteful number, since it uses less digits than its factorization.

99685579 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14240804.

The product of its digits is 6123600, while the sum is 58.

The square root of 99685579 is about 9984.2665729637. The cubic root of 99685579 is about 463.6719016123.

The spelling of 99685579 in words is "ninety-nine million, six hundred eighty-five thousand, five hundred seventy-nine".