99879091 has 8 divisors (see below), whose sum is σ = 107666384. Its totient is φ = 92106720.

The previous prime is 99879079. The next prime is 99879107. The reversal of 99879091 is 19097899.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 99879091 - 2¹⁹ = 99354803 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99879011) 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 7 ways as a sum of consecutive naturals, for example, 12976 + ... + 19186.

It is an arithmetic number, because the mean of its divisors is an integer number (13458298).

Almost surely, 2^99879091 is an apocalyptic number.

99879091 is a deficient number, since it is larger than the sum of its proper divisors (7787293).

99879091 is a wasteful number, since it uses less digits than its factorization.

99879091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7461.

The product of its (nonzero) digits is 367416, while the sum is 52.

The square root of 99879091 is about 9993.9527215211. The cubic root of 99879091 is about 463.9717379610.

It can be divided in two parts, 998 and 79091, that added together give a square (80089 = 283²).

The spelling of 99879091 in words is "ninety-nine million, eight hundred seventy-nine thousand, ninety-one".