1838869 has 2 divisors, whose sum is σ = 1838870. Its totient is φ = 1838868.

The previous prime is 1838843. The next prime is 1838909. The reversal of 1838869 is 9688381.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1782225 + 56644 = 1335^2 + 238^2 .

It is an emirp because it is prime and its reverse (9688381) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1838869 - 2⁷ = 1838741 is a prime.

It is a super-2 number, since 2×1838869² = 6762878398322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1838819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 919434 + 919435.

It is an arithmetic number, because the mean of its divisors is an integer number (919435).

2^1838869 is an apocalyptic number.

It is an amenable number.

1838869 is a deficient number, since it is larger than the sum of its proper divisors (1).

1838869 is an equidigital number, since it uses as much as digits as its factorization.

1838869 is an evil number, because the sum of its binary digits is even.

The product of its digits is 82944, while the sum is 43.

The square root of 1838869 is about 1356.0490404111. The cubic root of 1838869 is about 122.5134012827.

The spelling of 1838869 in words is "one million, eight hundred thirty-eight thousand, eight hundred sixty-nine".