99991048 has 16 divisors (see below), whose sum is σ = 187627500. Its totient is φ = 49957056.

The previous prime is 99991033. The next prime is 99991049. The reversal of 99991048 is 84019999.

It can be written as a sum of positive squares in 2 ways, for example, as 80964004 + 19027044 = 8998^2 + 4362^2 .

It is a junction number, because it is equal to n+sod(n) for n = 99990992 and 99991010.

It is not an unprimeable number, because it can be changed into a prime (99991049) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8358 + ... + 16426.

Almost surely, 2^99991048 is an apocalyptic number.

It is an amenable number.

99991048 is a deficient number, since it is larger than the sum of its proper divisors (87636452).

99991048 is a wasteful number, since it uses less digits than its factorization.

99991048 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9624 (or 9620 counting only the distinct ones).

The product of its (nonzero) digits is 209952, while the sum is 49.

The square root of 99991048 is about 9999.5523899823. The cubic root of 99991048 is about 464.1450324469.

The spelling of 99991048 in words is "ninety-nine million, nine hundred ninety-one thousand, forty-eight".