99912293 has 12 divisors (see below), whose sum is σ = 108774468. Its totient is φ = 91728000.

The previous prime is 99912283. The next prime is 99912313. The reversal of 99912293 is 39221999.

It can be written as a sum of positive squares in 6 ways, for example, as 252004 + 99660289 = 502^2 + 9983^2 .

It is not a de Polignac number, because 99912293 - 2¹² = 99908197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99912233) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 31793 + ... + 34793.

It is an arithmetic number, because the mean of its divisors is an integer number (9064539).

Almost surely, 2^99912293 is an apocalyptic number.

It is an amenable number.

99912293 is a deficient number, since it is larger than the sum of its proper divisors (8862175).

99912293 is a wasteful number, since it uses less digits than its factorization.

99912293 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3224 (or 3211 counting only the distinct ones).

The product of its digits is 78732, while the sum is 44.

The square root of 99912293 is about 9995.6136880134. The cubic root of 99912293 is about 464.0231437252.

The spelling of 99912293 in words is "ninety-nine million, nine hundred twelve thousand, two hundred ninety-three".