3721973 has 2 divisors, whose sum is σ = 3721974. Its totient is φ = 3721972.

The previous prime is 3721957. The next prime is 3721981. The reversal of 3721973 is 3791273.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3694084 + 27889 = 1922^2 + 167^2 .

It is an emirp because it is prime and its reverse (3791273) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3721973 - 2⁴ = 3721957 is a 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, 1860986 + 1860987.

It is an arithmetic number, because the mean of its divisors is an integer number (1860987).

Almost surely, 2^3721973 is an apocalyptic number.

It is an amenable number.

3721973 is a deficient number, since it is larger than the sum of its proper divisors (1).

3721973 is an equidigital number, since it uses as much as digits as its factorization.

3721973 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7938, while the sum is 32.

The square root of 3721973 is about 1929.2415608212. The cubic root of 3721973 is about 154.9736063280.

The spelling of 3721973 in words is "three million, seven hundred twenty-one thousand, nine hundred seventy-three".