3687869 has 2 divisors, whose sum is σ = 3687870. Its totient is φ = 3687868.

The previous prime is 3687857. The next prime is 3687911. The reversal of 3687869 is 9687863.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3496900 + 190969 = 1870^2 + 437^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3687869 is a prime.

It is a super-2 number, since 2×3687869² = 27200755522322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3687839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1843934 + 1843935.

It is an arithmetic number, because the mean of its divisors is an integer number (1843935).

Almost surely, 2^3687869 is an apocalyptic number.

It is an amenable number.

3687869 is a deficient number, since it is larger than the sum of its proper divisors (1).

3687869 is an equidigital number, since it uses as much as digits as its factorization.

3687869 is an evil number, because the sum of its binary digits is even.

The product of its digits is 435456, while the sum is 47.

The square root of 3687869 is about 1920.3825139800. The cubic root of 3687869 is about 154.4988182550.

The spelling of 3687869 in words is "three million, six hundred eighty-seven thousand, eight hundred sixty-nine".