3726691 has 2 divisors, whose sum is σ = 3726692. Its totient is φ = 3726690.

The previous prime is 3726683. The next prime is 3726721. The reversal of 3726691 is 1966273.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3726691 - 2³ = 3726683 is a prime.

3726691 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (3726631) 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, 1863345 + 1863346.

It is an arithmetic number, because the mean of its divisors is an integer number (1863346).

Almost surely, 2^3726691 is an apocalyptic number.

3726691 is a deficient number, since it is larger than the sum of its proper divisors (1).

3726691 is an equidigital number, since it uses as much as digits as its factorization.

3726691 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13608, while the sum is 34.

The square root of 3726691 is about 1930.4639338770. The cubic root of 3726691 is about 155.0390605685.

The spelling of 3726691 in words is "three million, seven hundred twenty-six thousand, six hundred ninety-one".