2938391 has 2 divisors, whose sum is σ = 2938392. Its totient is φ = 2938390.

The previous prime is 2938381. The next prime is 2938409. The reversal of 2938391 is 1938392.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2938391 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2938301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1469195 + 1469196.

It is an arithmetic number, because the mean of its divisors is an integer number (1469196).

2^2938391 is an apocalyptic number.

2938391 is a deficient number, since it is larger than the sum of its proper divisors (1).

2938391 is an equidigital number, since it uses as much as digits as its factorization.

2938391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11664, while the sum is 35.

The square root of 2938391 is about 1714.1735618076. The cubic root of 2938391 is about 143.2308365237.

Subtracting from 2938391 its reverse (1938392), we obtain a palindrome (999999).

The spelling of 2938391 in words is "two million, nine hundred thirty-eight thousand, three hundred ninety-one".