99135579 has 4 divisors (see below), whose sum is σ = 132180776. Its totient is φ = 66090384.

The previous prime is 99135571. The next prime is 99135583. The reversal of 99135579 is 97553199.

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

It is not a de Polignac number, because 99135579 - 2³ = 99135571 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99135571) 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, 16522594 + ... + 16522599.

It is an arithmetic number, because the mean of its divisors is an integer number (33045194).

Almost surely, 2^99135579 is an apocalyptic number.

99135579 is a deficient number, since it is larger than the sum of its proper divisors (33045197).

99135579 is a wasteful number, since it uses less digits than its factorization.

99135579 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33045196.

The product of its digits is 382725, while the sum is 48.

The square root of 99135579 is about 9956.6851411501. The cubic root of 99135579 is about 462.8175821213.

The spelling of 99135579 in words is "ninety-nine million, one hundred thirty-five thousand, five hundred seventy-nine".