4163381 has 2 divisors, whose sum is σ = 4163382. Its totient is φ = 4163380.

The previous prime is 4163371. The next prime is 4163387. The reversal of 4163381 is 1833614.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2640625 + 1522756 = 1625^2 + 1234^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4163381 is a prime.

It is a super-2 number, since 2×4163381² = 34667482702322, which contains 22 as substring.

It is a Sophie Germain prime.

It is an Ulam number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 4163381.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4163387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2081690 + 2081691.

It is an arithmetic number, because the mean of its divisors is an integer number (2081691).

Almost surely, 2^4163381 is an apocalyptic number.

It is an amenable number.

4163381 is a deficient number, since it is larger than the sum of its proper divisors (1).

4163381 is an equidigital number, since it uses as much as digits as its factorization.

4163381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1728, while the sum is 26.

The square root of 4163381 is about 2040.4364729146. The cubic root of 4163381 is about 160.8725892943.

Adding to 4163381 its reverse (1833614), we get a palindrome (5996995).

It can be divided in two parts, 41633 and 81, that added together give a palindrome (41714).

The spelling of 4163381 in words is "four million, one hundred sixty-three thousand, three hundred eighty-one".