2389181 has 2 divisors, whose sum is σ = 2389182. Its totient is φ = 2389180.

The previous prime is 2389141. The next prime is 2389183. The reversal of 2389181 is 1819832.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1666681 + 722500 = 1291^2 + 850^2 .

It is a cyclic number.

It is not a de Polignac number, because 2389181 - 2¹⁰ = 2388157 is a prime.

It is a super-2 number, since 2×2389181² = 11416371701522, which contains 22 as substring.

Together with 2389183, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2389183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1194590 + 1194591.

It is an arithmetic number, because the mean of its divisors is an integer number (1194591).

2^2389181 is an apocalyptic number.

It is an amenable number.

2389181 is a deficient number, since it is larger than the sum of its proper divisors (1).

2389181 is an equidigital number, since it uses as much as digits as its factorization.

2389181 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3456, while the sum is 32.

The square root of 2389181 is about 1545.6975771476. The cubic root of 2389181 is about 133.6851037545.

The spelling of 2389181 in words is "two million, three hundred eighty-nine thousand, one hundred eighty-one".