3973091 has 4 divisors (see below), whose sum is σ = 3980712. Its totient is φ = 3965472.

The previous prime is 3973063. The next prime is 3973093. The reversal of 3973091 is 1903793.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1903793 = 907 ⋅2099.

It is a cyclic number.

It is not a de Polignac number, because 3973091 - 2⁶ = 3973027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3973093) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2966 + ... + 4091.

It is an arithmetic number, because the mean of its divisors is an integer number (995178).

Almost surely, 2^3973091 is an apocalyptic number.

3973091 is a deficient number, since it is larger than the sum of its proper divisors (7621).

3973091 is an equidigital number, since it uses as much as digits as its factorization.

3973091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7620.

The product of its (nonzero) digits is 5103, while the sum is 32.

The square root of 3973091 is about 1993.2613978101. The cubic root of 3973091 is about 158.3833425287.

The spelling of 3973091 in words is "three million, nine hundred seventy-three thousand, ninety-one".