3813869 has 2 divisors, whose sum is σ = 3813870. Its totient is φ = 3813868.

The previous prime is 3813847. The next prime is 3813871. The reversal of 3813869 is 9683183.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3496900 + 316969 = 1870^2 + 563^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3813869 is a prime.

It is a super-2 number, since 2×3813869² = 29091193498322, which contains 22 as substring.

Together with 3813871, it forms a pair of twin primes.

It is a Chen prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3813169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1906934 + 1906935.

It is an arithmetic number, because the mean of its divisors is an integer number (1906935).

Almost surely, 2^3813869 is an apocalyptic number.

It is an amenable number.

3813869 is a deficient number, since it is larger than the sum of its proper divisors (1).

3813869 is an equidigital number, since it uses as much as digits as its factorization.

3813869 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31104, while the sum is 38.

The square root of 3813869 is about 1952.9129524892. The cubic root of 3813869 is about 156.2386905948.

The spelling of 3813869 in words is "three million, eight hundred thirteen thousand, eight hundred sixty-nine".