3685949 has 2 divisors, whose sum is σ = 3685950. Its totient is φ = 3685948.

The previous prime is 3685883. The next prime is 3685951. The reversal of 3685949 is 9495863.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3678724 + 7225 = 1918^2 + 85^2 .

It is a cyclic number.

It is not a de Polignac number, because 3685949 - 2²⁰ = 2637373 is a prime.

Together with 3685951, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3685999) 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, 1842974 + 1842975.

It is an arithmetic number, because the mean of its divisors is an integer number (1842975).

Almost surely, 2^3685949 is an apocalyptic number.

It is an amenable number.

3685949 is a deficient number, since it is larger than the sum of its proper divisors (1).

3685949 is an equidigital number, since it uses as much as digits as its factorization.

3685949 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 233280, while the sum is 44.

The square root of 3685949 is about 1919.8825484909. The cubic root of 3685949 is about 154.4720015735.

The spelling of 3685949 in words is "three million, six hundred eighty-five thousand, nine hundred forty-nine".