3340391 has 2 divisors, whose sum is σ = 3340392. Its totient is φ = 3340390.

The previous prime is 3340387. The next prime is 3340411. The reversal of 3340391 is 1930433.

It is a weak prime.

It is an emirp because it is prime and its reverse (1930433) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3340391 - 2² = 3340387 is a prime.

It is a super-2 number, since 2×3340391² = 22316424065762, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3340301) 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, 1670195 + 1670196.

It is an arithmetic number, because the mean of its divisors is an integer number (1670196).

Almost surely, 2^3340391 is an apocalyptic number.

3340391 is a deficient number, since it is larger than the sum of its proper divisors (1).

3340391 is an equidigital number, since it uses as much as digits as its factorization.

3340391 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 972, while the sum is 23.

The square root of 3340391 is about 1827.6736579598. The cubic root of 3340391 is about 149.4855114351.

The spelling of 3340391 in words is "three million, three hundred forty thousand, three hundred ninety-one".