2940391 has 2 divisors, whose sum is σ = 2940392. Its totient is φ = 2940390.

The previous prime is 2940317. The next prime is 2940401. The reversal of 2940391 is 1930492.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2940391 - 2⁷ = 2940263 is a prime.

It is a Chen prime.

It is a plaindrome in base 14.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2920391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1470195 + 1470196.

It is an arithmetic number, because the mean of its divisors is an integer number (1470196).

2^2940391 is an apocalyptic number.

2940391 is a deficient number, since it is larger than the sum of its proper divisors (1).

2940391 is an equidigital number, since it uses as much as digits as its factorization.

2940391 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 2940391 is about 1714.7568340730. The cubic root of 2940391 is about 143.2633255860.

The spelling of 2940391 in words is "two million, nine hundred forty thousand, three hundred ninety-one".