991983802 has 16 divisors (see below), whose sum is σ = 1543445640. Its totient is φ = 477594432.

The previous prime is 991983761. The next prime is 991983823. The reversal of 991983802 is 208389199.

991983802 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 4 ways, for example, as 987279241 + 4704561 = 31421^2 + 2169^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1293 + ... + 44560.

Almost surely, 2^991983802 is an apocalyptic number.

991983802 is a deficient number, since it is larger than the sum of its proper divisors (551461838).

991983802 is a wasteful number, since it uses less digits than its factorization.

991983802 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46257.

The product of its (nonzero) digits is 279936, while the sum is 49.

The square root of 991983802 is about 31495.7743514904. The cubic root of 991983802 is about 997.3207620951.

The spelling of 991983802 in words is "nine hundred ninety-one million, nine hundred eighty-three thousand, eight hundred two".