4021973 has 2 divisors, whose sum is σ = 4021974. Its totient is φ = 4021972.

The previous prime is 4021967. The next prime is 4022003. The reversal of 4021973 is 3791204.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3659569 + 362404 = 1913^2 + 602^2 .

It is a cyclic number.

It is not a de Polignac number, because 4021973 - 2¹⁰ = 4020949 is a prime.

It is a nialpdrome in base 13.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4021903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2010986 + 2010987.

It is an arithmetic number, because the mean of its divisors is an integer number (2010987).

Almost surely, 2^4021973 is an apocalyptic number.

It is an amenable number.

4021973 is a deficient number, since it is larger than the sum of its proper divisors (1).

4021973 is an equidigital number, since it uses as much as digits as its factorization.

4021973 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 4021973 is about 2005.4857267006. The cubic root of 4021973 is about 159.0302409418.

It can be divided in two parts, 4021 and 973, that added together give a palindrome (4994).

The spelling of 4021973 in words is "four million, twenty-one thousand, nine hundred seventy-three".