4018361 has 2 divisors, whose sum is σ = 4018362. Its totient is φ = 4018360.

The previous prime is 4018349. The next prime is 4018363. The reversal of 4018361 is 1638104.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3171961 + 846400 = 1781^2 + 920^2 .

It is a cyclic number.

It is not a de Polignac number, because 4018361 - 2⁶ = 4018297 is a prime.

It is a super-2 number, since 2×4018361² = 32294450252642, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 4018363, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (4018363) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2009180 + 2009181.

It is an arithmetic number, because the mean of its divisors is an integer number (2009181).

Almost surely, 2^4018361 is an apocalyptic number.

It is an amenable number.

4018361 is a deficient number, since it is larger than the sum of its proper divisors (1).

4018361 is an equidigital number, since it uses as much as digits as its factorization.

4018361 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 4018361 is about 2004.5849944565. The cubic root of 4018361 is about 158.9826200958.

The spelling of 4018361 in words is "four million, eighteen thousand, three hundred sixty-one".