99997242 has 8 divisors (see below), whose sum is σ = 199994496. Its totient is φ = 33332412.

The previous prime is 99997189. The next prime is 99997243. The reversal of 99997242 is 24279999.

It is a happy number.

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

99997242 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (99997243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8333098 + ... + 8333109.

It is an arithmetic number, because the mean of its divisors is an integer number (24999312).

Almost surely, 2^99997242 is an apocalyptic number.

99997242 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

99997242 is a wasteful number, since it uses less digits than its factorization.

99997242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16666212.

The product of its digits is 734832, while the sum is 51.

The square root of 99997242 is about 9999.8620990492. The cubic root of 99997242 is about 464.1546161547.

The spelling of 99997242 in words is "ninety-nine million, nine hundred ninety-seven thousand, two hundred forty-two".