99942291 has 24 divisors (see below), whose sum is σ = 154720800. Its totient is φ = 62004096.

The previous prime is 99942289. The next prime is 99942317. The reversal of 99942291 is 19224999.

It is not a de Polignac number, because 99942291 - 2¹ = 99942289 is a prime.

It is not an unprimeable number, because it can be changed into a prime (99942211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1135 + ... + 14183.

It is an arithmetic number, because the mean of its divisors is an integer number (6446700).

Almost surely, 2^99942291 is an apocalyptic number.

99942291 is a deficient number, since it is larger than the sum of its proper divisors (54778509).

99942291 is a wasteful number, since it uses less digits than its factorization.

99942291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13115 (or 13112 counting only the distinct ones).

The product of its digits is 104976, while the sum is 45.

The square root of 99942291 is about 9997.1141335888. The cubic root of 99942291 is about 464.0695790302.

The spelling of 99942291 in words is "ninety-nine million, nine hundred forty-two thousand, two hundred ninety-one".