163903941 has 6 divisors (see below), whose sum is σ = 236750150. Its totient is φ = 109269288.

The previous prime is 163903939. The next prime is 163903951. The reversal of 163903941 is 149309361.

It can be written as a sum of positive squares in only one way, i.e., 156500100 + 7403841 = 12510^2 + 2721^2 .

It is not a de Polignac number, because 163903941 - 2¹ = 163903939 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 163903896 and 163903905.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163903921) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9105766 + ... + 9105783.

Almost surely, 2^163903941 is an apocalyptic number.

It is an amenable number.

163903941 is a deficient number, since it is larger than the sum of its proper divisors (72846209).

163903941 is a wasteful number, since it uses less digits than its factorization.

163903941 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18211555 (or 18211552 counting only the distinct ones).

The product of its (nonzero) digits is 17496, while the sum is 36.

The square root of 163903941 is about 12802.4974516693. The cubic root of 163903941 is about 547.2634769935.

The spelling of 163903941 in words is "one hundred sixty-three million, nine hundred three thousand, nine hundred forty-one".