2891359391 has 2 divisors, whose sum is σ = 2891359392. Its totient is φ = 2891359390.

The previous prime is 2891359379. The next prime is 2891359451. The reversal of 2891359391 is 1939531982.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2891359391 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2891359091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1445679695 + 1445679696.

It is an arithmetic number, because the mean of its divisors is an integer number (1445679696).

Almost surely, 2^2891359391 is an apocalyptic number.

2891359391 is a deficient number, since it is larger than the sum of its proper divisors (1).

2891359391 is an equidigital number, since it uses as much as digits as its factorization.

2891359391 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 524880, while the sum is 50.

The square root of 2891359391 is about 53771.3621828571. The cubic root of 2891359391 is about 1424.6254299799.

The spelling of 2891359391 in words is "two billion, eight hundred ninety-one million, three hundred fifty-nine thousand, three hundred ninety-one".