99990254 has 32 divisors (see below), whose sum is σ = 186701760. Its totient is φ = 39105792.

The previous prime is 99990239. The next prime is 99990263. The reversal of 99990254 is 45209999.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 99990199 and 99990208.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 13112 + ... + 19284.

It is an arithmetic number, because the mean of its divisors is an integer number (5834430).

Almost surely, 2^99990254 is an apocalyptic number.

99990254 is a deficient number, since it is larger than the sum of its proper divisors (86711506).

99990254 is a wasteful number, since it uses less digits than its factorization.

99990254 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6284.

The product of its (nonzero) digits is 262440, while the sum is 47.

The square root of 99990254 is about 9999.5126881264. The cubic root of 99990254 is about 464.1438038965.

The spelling of 99990254 in words is "ninety-nine million, nine hundred ninety thousand, two hundred fifty-four".