99912279 has 16 divisors (see below), whose sum is σ = 145065600. Its totient is φ = 60925536.

The previous prime is 99912269. The next prime is 99912283. The reversal of 99912279 is 97221999.

It is not a de Polignac number, because 99912279 - 2⁷ = 99912151 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99912269) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28569 + ... + 31874.

It is an arithmetic number, because the mean of its divisors is an integer number (9066600).

Almost surely, 2^99912279 is an apocalyptic number.

99912279 is a deficient number, since it is larger than the sum of its proper divisors (45153321).

99912279 is a wasteful number, since it uses less digits than its factorization.

99912279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60494.

The product of its digits is 183708, while the sum is 48.

The square root of 99912279 is about 9995.6129877062. The cubic root of 99912279 is about 464.0231220518.

The spelling of 99912279 in words is "ninety-nine million, nine hundred twelve thousand, two hundred seventy-nine".