163987122 has 48 divisors (see below), whose sum is σ = 363499488. Its totient is φ = 49271040.

The previous prime is 163987097. The next prime is 163987169. The reversal of 163987122 is 221789361.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 41722 + ... + 45482.

It is an arithmetic number, because the mean of its divisors is an integer number (7572906).

Almost surely, 2^163987122 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 163987122, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (181749744).

163987122 is an abundant number, since it is smaller than the sum of its proper divisors (199512366).

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

163987122 is a wasteful number, since it uses less digits than its factorization.

163987122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3835 (or 3822 counting only the distinct ones).

The product of its digits is 36288, while the sum is 39.

The square root of 163987122 is about 12805.7456635684. The cubic root of 163987122 is about 547.3560397967.

The spelling of 163987122 in words is "one hundred sixty-three million, nine hundred eighty-seven thousand, one hundred twenty-two".