3974491 has 2 divisors, whose sum is σ = 3974492. Its totient is φ = 3974490.

The previous prime is 3974483. The next prime is 3974497. The reversal of 3974491 is 1944793.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 3974491 - 2³ = 3974483 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3974491.

It is not a weakly prime, because it can be changed into another prime (3974497) 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, 1987245 + 1987246.

It is an arithmetic number, because the mean of its divisors is an integer number (1987246).

Almost surely, 2^3974491 is an apocalyptic number.

3974491 is a deficient number, since it is larger than the sum of its proper divisors (1).

3974491 is an equidigital number, since it uses as much as digits as its factorization.

3974491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27216, while the sum is 37.

The square root of 3974491 is about 1993.6125501210. The cubic root of 3974491 is about 158.4019435491.

It can be divided in two parts, 3974 and 491, that added together give a triangular number (4465 = T₉₄).

The spelling of 3974491 in words is "three million, nine hundred seventy-four thousand, four hundred ninety-one".