163978712 has 16 divisors (see below), whose sum is σ = 307725000. Its totient is φ = 81918720.

The previous prime is 163978693. The next prime is 163978729. The reversal of 163978712 is 217879361.

163978712 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1787 + ... + 18197.

Almost surely, 2^163978712 is an apocalyptic number.

It is an amenable number.

163978712 is a deficient number, since it is larger than the sum of its proper divisors (143746288).

163978712 is a wasteful number, since it uses less digits than its factorization.

163978712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17666 (or 17662 counting only the distinct ones).

The product of its digits is 127008, while the sum is 44.

The square root of 163978712 is about 12805.4172911311. The cubic root of 163978712 is about 547.3466826737.

The spelling of 163978712 in words is "one hundred sixty-three million, nine hundred seventy-eight thousand, seven hundred twelve".