163988676 has 18 divisors (see below), whose sum is σ = 414527022. Its totient is φ = 54662880.

The previous prime is 163988611. The next prime is 163988683. The reversal of 163988676 is 676889361.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 120428676 + 43560000 = 10974^2 + 6600^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2277585 + ... + 2277656.

It is an arithmetic number, because the mean of its divisors is an integer number (23029279).

Almost surely, 2^163988676 is an apocalyptic number.

It is an amenable number.

163988676 is an abundant number, since it is smaller than the sum of its proper divisors (250538346).

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

163988676 is a wasteful number, since it uses less digits than its factorization.

163988676 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4555251 (or 4555246 counting only the distinct ones).

The product of its digits is 2612736, while the sum is 54.

The square root of 163988676 is about 12805.8063393134. The cubic root of 163988676 is about 547.3577687711.

The spelling of 163988676 in words is "one hundred sixty-three million, nine hundred eighty-eight thousand, six hundred seventy-six".