3874391 has 2 divisors, whose sum is σ = 3874392. Its totient is φ = 3874390.

The previous prime is 3874379. The next prime is 3874393. The reversal of 3874391 is 1934783.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 3874391 - 2¹⁰ = 3873367 is a prime.

Together with 3874393, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3874393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1937195 + 1937196.

It is an arithmetic number, because the mean of its divisors is an integer number (1937196).

Almost surely, 2^3874391 is an apocalyptic number.

3874391 is a deficient number, since it is larger than the sum of its proper divisors (1).

3874391 is an equidigital number, since it uses as much as digits as its factorization.

3874391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18144, while the sum is 35.

The square root of 3874391 is about 1968.3472762701. The cubic root of 3874391 is about 157.0608037979.

The spelling of 3874391 in words is "three million, eight hundred seventy-four thousand, three hundred ninety-one".