9981369390 has 32 divisors (see below), whose sum is σ = 23980491936. Its totient is φ = 2658897920.

The previous prime is 9981369371. The next prime is 9981369403. The reversal of 9981369390 is 939631899.

It is a self number, because there is not a number n which added to its sum of digits gives 9981369390.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 145971 + ... + 203150.

It is an arithmetic number, because the mean of its divisors is an integer number (749390373).

Almost surely, 2^9981369390 is an apocalyptic number.

9981369390 is an abundant number, since it is smaller than the sum of its proper divisors (13999122546).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9981369390 is a wasteful number, since it uses less digits than its factorization.

9981369390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 350084.

The product of its (nonzero) digits is 2834352, while the sum is 57.

The square root of 9981369390 is about 99906.8035220825. The cubic root of 9981369390 is about 2153.0959105287.

The spelling of 9981369390 in words is "nine billion, nine hundred eighty-one million, three hundred sixty-nine thousand, three hundred ninety".