989190221827 has 16 divisors (see below), whose sum is σ = 1008308551680. Its totient is φ = 970250580000.

The previous prime is 989190221779. The next prime is 989190221839. The reversal of 989190221827 is 728122091989.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-989190221827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (989190221527) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11288193 + ... + 11375485.

It is an arithmetic number, because the mean of its divisors is an integer number (63019284480).

Almost surely, 2^989190221827 is an apocalyptic number.

989190221827 is a deficient number, since it is larger than the sum of its proper divisors (19118329853).

989190221827 is a wasteful number, since it uses less digits than its factorization.

989190221827 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88314.

The product of its (nonzero) digits is 2612736, while the sum is 58.

The spelling of 989190221827 in words is "nine hundred eighty-nine billion, one hundred ninety million, two hundred twenty-one thousand, eight hundred twenty-seven".