3973949 has 6 divisors (see below), whose sum is σ = 4622814. Its totient is φ = 3406200.

The previous prime is 3973943. The next prime is 3973973. The reversal of 3973949 is 9493793.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 3705625 + 268324 = 1925^2 + 518^2 .

It is not a de Polignac number, because 3973949 - 2⁴ = 3973933 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3973943) 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, 40502 + ... + 40599.

It is an arithmetic number, because the mean of its divisors is an integer number (770469).

Almost surely, 2^3973949 is an apocalyptic number.

It is an amenable number.

3973949 is a deficient number, since it is larger than the sum of its proper divisors (648865).

3973949 is an equidigital number, since it uses as much as digits as its factorization.

3973949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81115 (or 81108 counting only the distinct ones).

The product of its digits is 183708, while the sum is 44.

The square root of 3973949 is about 1993.4766113501. The cubic root of 3973949 is about 158.3947428152.

The spelling of 3973949 in words is "three million, nine hundred seventy-three thousand, nine hundred forty-nine".