3581869 has 2 divisors, whose sum is σ = 3581870. Its totient is φ = 3581868.

The previous prime is 3581867. The next prime is 3581873. The reversal of 3581869 is 9681853.

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., 2601769 + 980100 = 1613^2 + 990^2 .

It is a cyclic number.

It is not a de Polignac number, because 3581869 - 2¹ = 3581867 is a prime.

It is a super-2 number, since 2×3581869² = 25659571066322, which contains 22 as substring.

Together with 3581867, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3581867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1790934 + 1790935.

It is an arithmetic number, because the mean of its divisors is an integer number (1790935).

Almost surely, 2^3581869 is an apocalyptic number.

It is an amenable number.

3581869 is a deficient number, since it is larger than the sum of its proper divisors (1).

3581869 is an equidigital number, since it uses as much as digits as its factorization.

3581869 is an evil number, because the sum of its binary digits is even.

The product of its digits is 51840, while the sum is 40.

The square root of 3581869 is about 1892.5826269941. The cubic root of 3581869 is about 153.0041578320.

The spelling of 3581869 in words is "three million, five hundred eighty-one thousand, eight hundred sixty-nine".