99999426 has 16 divisors (see below), whose sum is σ = 200548224. Its totient is φ = 33241584.

The previous prime is 99999401. The next prime is 99999437. The reversal of 99999426 is 62499999.

It is a Curzon number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 20505 + ... + 24908.

It is an arithmetic number, because the mean of its divisors is an integer number (12534264).

Almost surely, 2^99999426 is an apocalyptic number.

99999426 is an abundant number, since it is smaller than the sum of its proper divisors (100548798).

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

99999426 is a wasteful number, since it uses less digits than its factorization.

99999426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45785.

The product of its digits is 2834352, while the sum is 57.

The square root of 99999426 is about 9999.9712999588. The cubic root of 99999426 is about 464.1579952689.

The spelling of 99999426 in words is "ninety-nine million, nine hundred ninety-nine thousand, four hundred twenty-six".