3697691 has 2 divisors, whose sum is σ = 3697692. Its totient is φ = 3697690.

The previous prime is 3697657. The next prime is 3697709. The reversal of 3697691 is 1967963.

It is a happy number.

3697691 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3697691 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (3697591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1848845 + 1848846.

It is an arithmetic number, because the mean of its divisors is an integer number (1848846).

Almost surely, 2^3697691 is an apocalyptic number.

3697691 is a deficient number, since it is larger than the sum of its proper divisors (1).

3697691 is an equidigital number, since it uses as much as digits as its factorization.

3697691 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 61236, while the sum is 41.

The square root of 3697691 is about 1922.9381165290. The cubic root of 3697691 is about 154.6358569436.

The spelling of 3697691 in words is "three million, six hundred ninety-seven thousand, six hundred ninety-one".