991303898 has 32 divisors (see below), whose sum is σ = 1698160464. Its totient is φ = 429944832.

The previous prime is 991303883. The next prime is 991303903. The reversal of 991303898 is 898303199.

991303898 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 924342409 + 66961489 = 30403^2 + 8183^2 .

It is a Smith number, since the sum of its digits (50) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 377486 + ... + 380102.

Almost surely, 2^991303898 is an apocalyptic number.

991303898 is a deficient number, since it is larger than the sum of its proper divisors (706856566).

991303898 is a wasteful number, since it uses less digits than its factorization.

991303898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3506.

The product of its (nonzero) digits is 419904, while the sum is 50.

The square root of 991303898 is about 31484.9789264659. The cubic root of 991303898 is about 997.0928560372.

The spelling of 991303898 in words is "nine hundred ninety-one million, three hundred three thousand, eight hundred ninety-eight".