2891822279 has 2 divisors, whose sum is σ = 2891822280. Its totient is φ = 2891822278.

The previous prime is 2891822233. The next prime is 2891822293. The reversal of 2891822279 is 9722281982.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2891822279 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2891821279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1445911139 + 1445911140.

It is an arithmetic number, because the mean of its divisors is an integer number (1445911140).

Almost surely, 2^2891822279 is an apocalyptic number.

2891822279 is a deficient number, since it is larger than the sum of its proper divisors (1).

2891822279 is an equidigital number, since it uses as much as digits as its factorization.

2891822279 is an evil number, because the sum of its binary digits is even.

The product of its digits is 580608, while the sum is 50.

The square root of 2891822279 is about 53775.6662348315. Note that the first 3 decimals coincide. The cubic root of 2891822279 is about 1424.7014503725.

The spelling of 2891822279 in words is "two billion, eight hundred ninety-one million, eight hundred twenty-two thousand, two hundred seventy-nine".