3721943 has 2 divisors, whose sum is σ = 3721944. Its totient is φ = 3721942.

The previous prime is 3721933. The next prime is 3721957. The reversal of 3721943 is 3491273.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3721943 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3721933) 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, 1860971 + 1860972.

It is an arithmetic number, because the mean of its divisors is an integer number (1860972).

Almost surely, 2^3721943 is an apocalyptic number.

3721943 is a deficient number, since it is larger than the sum of its proper divisors (1).

3721943 is an equidigital number, since it uses as much as digits as its factorization.

3721943 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4536, while the sum is 29.

The square root of 3721943 is about 1929.2337857295. The cubic root of 3721943 is about 154.9731899520.

It can be divided in two parts, 3721 and 943, that added together give a palindrome (4664).

The spelling of 3721943 in words is "three million, seven hundred twenty-one thousand, nine hundred forty-three".