99904473 has 12 divisors (see below), whose sum is σ = 144415908. Its totient is φ = 66552480.

The previous prime is 99904463. The next prime is 99904487. The reversal of 99904473 is 37440999.

99904473 is a `hidden beast` number, since 99 + 90 + 4 + 473 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 18688329 + 81216144 = 4323^2 + 9012^2 .

It is not a de Polignac number, because 99904473 - 2⁴ = 99904457 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (99904463) 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 11 ways as a sum of consecutive naturals, for example, 11343 + ... + 18123.

It is an arithmetic number, because the mean of its divisors is an integer number (12034659).

Almost surely, 2^99904473 is an apocalyptic number.

It is an amenable number.

99904473 is a deficient number, since it is larger than the sum of its proper divisors (44511435).

99904473 is a wasteful number, since it uses less digits than its factorization.

99904473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8424 (or 8421 counting only the distinct ones).

The product of its (nonzero) digits is 244944, while the sum is 45.

The square root of 99904473 is about 9995.2225087789. Note that the first 3 decimals coincide. The cubic root of 99904473 is about 464.0110372548.

The spelling of 99904473 in words is "ninety-nine million, nine hundred four thousand, four hundred seventy-three".