163978954 has 8 divisors (see below), whose sum is σ = 248404068. Its totient is φ = 81177600.

The previous prime is 163978921. The next prime is 163978981. The reversal of 163978954 is 459879361.

It is a happy number.

163978954 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 163456225 + 522729 = 12785^2 + 723^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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, 405687 + ... + 406090.

Almost surely, 2^163978954 is an apocalyptic number.

163978954 is a deficient number, since it is larger than the sum of its proper divisors (84425114).

163978954 is a wasteful number, since it uses less digits than its factorization.

163978954 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 811880.

The product of its digits is 1632960, while the sum is 52.

The square root of 163978954 is about 12805.4267402535. The cubic root of 163978954 is about 547.3469519319.

The spelling of 163978954 in words is "one hundred sixty-three million, nine hundred seventy-eight thousand, nine hundred fifty-four".