163978950 has 48 divisors (see below), whose sum is σ = 411598656. Its totient is φ = 43197600.

The previous prime is 163978921. The next prime is 163978981. The reversal of 163978950 is 59879361.

163978950 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 163978950.

It is a congruent number.

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, 5865 + ... + 19035.

It is an arithmetic number, because the mean of its divisors is an integer number (8574972).

Almost surely, 2^163978950 is an apocalyptic number.

163978950 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 163978950, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (205799328).

163978950 is an abundant number, since it is smaller than the sum of its proper divisors (247619706).

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

163978950 is a wasteful number, since it uses less digits than its factorization.

163978950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13269 (or 13264 counting only the distinct ones).

The product of its (nonzero) digits is 408240, while the sum is 48.

The square root of 163978950 is about 12805.4265840697. The cubic root of 163978950 is about 547.3469474814.

The spelling of 163978950 in words is "one hundred sixty-three million, nine hundred seventy-eight thousand, nine hundred fifty".