990683851 has 4 divisors (see below), whose sum is σ = 1000492704. Its totient is φ = 980875000.

The previous prime is 990683821. The next prime is 990683873. The reversal of 990683851 is 158386099.

990683851 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 990683851 - 2¹⁷ = 990552779 is a prime.

It is a super-3 number, since 3×990683851³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 990683795 and 990683804.

It is not an unprimeable number, because it can be changed into a prime (990683821) 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, 4904275 + ... + 4904476.

It is an arithmetic number, because the mean of its divisors is an integer number (250123176).

Almost surely, 2^990683851 is an apocalyptic number.

990683851 is a deficient number, since it is larger than the sum of its proper divisors (9808853).

990683851 is a wasteful number, since it uses less digits than its factorization.

990683851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9808852.

The product of its (nonzero) digits is 466560, while the sum is 49.

The square root of 990683851 is about 31475.1306748677. The cubic root of 990683851 is about 996.8849233735.

The spelling of 990683851 in words is "nine hundred ninety million, six hundred eighty-three thousand, eight hundred fifty-one".