3040391 has 2 divisors, whose sum is σ = 3040392. Its totient is φ = 3040390.

The previous prime is 3040381. The next prime is 3040409. The reversal of 3040391 is 1930403.

3040391 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3040391 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3040321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1520195 + 1520196.

It is an arithmetic number, because the mean of its divisors is an integer number (1520196).

Almost surely, 2^3040391 is an apocalyptic number.

3040391 is a deficient number, since it is larger than the sum of its proper divisors (1).

3040391 is an equidigital number, since it uses as much as digits as its factorization.

3040391 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 324, while the sum is 20.

The square root of 3040391 is about 1743.6717007510. The cubic root of 3040391 is about 144.8693392916.

Adding to 3040391 its reverse (1930403), we get a palindrome (4970794).

The spelling of 3040391 in words is "three million, forty thousand, three hundred ninety-one".