981823166 has 4 divisors (see below), whose sum is σ = 1472734752. Its totient is φ = 490911582.

The previous prime is 981823153. The next prime is 981823201. The reversal of 981823166 is 661328189.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 245455790 + ... + 245455793.

It is an arithmetic number, because the mean of its divisors is an integer number (368183688).

Almost surely, 2^981823166 is an apocalyptic number.

981823166 is a deficient number, since it is larger than the sum of its proper divisors (490911586).

981823166 is a wasteful number, since it uses less digits than its factorization.

981823166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 490911585.

The product of its digits is 124416, while the sum is 44.

The square root of 981823166 is about 31334.0576051044. The cubic root of 981823166 is about 993.9039692552.

The spelling of 981823166 in words is "nine hundred eighty-one million, eight hundred twenty-three thousand, one hundred sixty-six".