3721847 has 2 divisors, whose sum is σ = 3721848. Its totient is φ = 3721846.

The previous prime is 3721813. The next prime is 3721849. The reversal of 3721847 is 7481273.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 3721847 - 2¹² = 3717751 is a prime.

Together with 3721849, 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 (3721849) 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, 1860923 + 1860924.

It is an arithmetic number, because the mean of its divisors is an integer number (1860924).

Almost surely, 2^3721847 is an apocalyptic number.

3721847 is a deficient number, since it is larger than the sum of its proper divisors (1).

3721847 is an equidigital number, since it uses as much as digits as its factorization.

3721847 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9408, while the sum is 32.

The square root of 3721847 is about 1929.2089052251. The cubic root of 3721847 is about 154.9718575337.

The spelling of 3721847 in words is "three million, seven hundred twenty-one thousand, eight hundred forty-seven".