3420191 has 2 divisors, whose sum is σ = 3420192. Its totient is φ = 3420190.

The previous prime is 3420187. The next prime is 3420203. The reversal of 3420191 is 1910243.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3420191 - 2² = 3420187 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3420101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1710095 + 1710096.

It is an arithmetic number, because the mean of its divisors is an integer number (1710096).

Almost surely, 2^3420191 is an apocalyptic number.

3420191 is a deficient number, since it is larger than the sum of its proper divisors (1).

3420191 is an equidigital number, since it uses as much as digits as its factorization.

3420191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 3420191 is about 1849.3758406554. The cubic root of 3420191 is about 150.6665301597. Note that the first 3 decimals are identical.

The spelling of 3420191 in words is "three million, four hundred twenty thousand, one hundred ninety-one".