9990803771 has 8 divisors (see below), whose sum is σ = 10988249664. Its totient is φ = 9026061120.

The previous prime is 9990803747. The next prime is 9990803773. The reversal of 9990803771 is 1773080999.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 9990803771 - 2¹⁰ = 9990802747 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9990803773) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8175170 + ... + 8176391.

It is an arithmetic number, because the mean of its divisors is an integer number (1373531208).

Almost surely, 2^9990803771 is an apocalyptic number.

9990803771 is a deficient number, since it is larger than the sum of its proper divisors (997445893).

9990803771 is a wasteful number, since it uses less digits than its factorization.

9990803771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16351621.

The product of its (nonzero) digits is 857304, while the sum is 53.

The square root of 9990803771 is about 99954.0082788079. The cubic root of 9990803771 is about 2153.7740649893.

The spelling of 9990803771 in words is "nine billion, nine hundred ninety million, eight hundred three thousand, seven hundred seventy-one".