163971441 has 12 divisors (see below), whose sum is σ = 236971332. Its totient is φ = 109257216.

The previous prime is 163971413. The next prime is 163971469. The reversal of 163971441 is 144179361.

163971441 is a `hidden beast` number, since 1 + 639 + 7 + 14 + 4 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (163971413) and next prime (163971469).

It can be written as a sum of positive squares in 2 ways, for example, as 39425841 + 124545600 = 6279^2 + 11160^2 .

It is not a de Polignac number, because 163971441 - 2⁶ = 163971377 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 163971396 and 163971405.

It is not an unprimeable number, because it can be changed into a prime (163971541) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 20485 + ... + 27341.

It is an arithmetic number, because the mean of its divisors is an integer number (19747611).

Almost surely, 2^163971441 is an apocalyptic number.

It is an amenable number.

163971441 is a deficient number, since it is larger than the sum of its proper divisors (72999891).

163971441 is a wasteful number, since it uses less digits than its factorization.

163971441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9520 (or 9517 counting only the distinct ones).

The product of its digits is 18144, while the sum is 36.

The square root of 163971441 is about 12805.1333847016. The cubic root of 163971441 is about 547.3385925656.

The spelling of 163971441 in words is "one hundred sixty-three million, nine hundred seventy-one thousand, four hundred forty-one".