2043869 has 2 divisors, whose sum is σ = 2043870. Its totient is φ = 2043868.

The previous prime is 2043851. The next prime is 2043907. The reversal of 2043869 is 9683402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1532644 + 511225 = 1238^2 + 715^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2043869 is a prime.

It is a super-2 number, since 2×2043869² = 8354800978322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2043169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1021934 + 1021935.

It is an arithmetic number, because the mean of its divisors is an integer number (1021935).

2^2043869 is an apocalyptic number.

It is an amenable number.

2043869 is a deficient number, since it is larger than the sum of its proper divisors (1).

2043869 is an equidigital number, since it uses as much as digits as its factorization.

2043869 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 2043869 is about 1429.6394650400. The cubic root of 2043869 is about 126.9066418690.

The spelling of 2043869 in words is "two million, forty-three thousand, eight hundred sixty-nine".