3921973 has 6 divisors (see below), whose sum is σ = 4311062. Its totient is φ = 3565320.

The previous prime is 3921971. The next prime is 3921991. The reversal of 3921973 is 3791293.

It can be written as a sum of positive squares in only one way, i.e., 3833764 + 88209 = 1958^2 + 297^2 .

It is not a de Polignac number, because 3921973 - 2¹ = 3921971 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3921971) 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 in 5 ways as a sum of consecutive naturals, for example, 16086 + ... + 16327.

Almost surely, 2^3921973 is an apocalyptic number.

It is an amenable number.

3921973 is a deficient number, since it is larger than the sum of its proper divisors (389089).

3921973 is a wasteful number, since it uses less digits than its factorization.

3921973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32435 (or 32424 counting only the distinct ones).

The product of its digits is 10206, while the sum is 34.

The square root of 3921973 is about 1980.3971823854. The cubic root of 3921973 is about 157.7011522427.

The spelling of 3921973 in words is "three million, nine hundred twenty-one thousand, nine hundred seventy-three".