2778791227 has 2 divisors, whose sum is σ = 2778791228. Its totient is φ = 2778791226.

The previous prime is 2778791201. The next prime is 2778791233. The reversal of 2778791227 is 7221978772.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2778791227 is a prime.

It is not a weakly prime, because it can be changed into another prime (2778791527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1389395613 + 1389395614.

It is an arithmetic number, because the mean of its divisors is an integer number (1389395614).

Almost surely, 2^2778791227 is an apocalyptic number.

2778791227 is a deficient number, since it is larger than the sum of its proper divisors (1).

2778791227 is an equidigital number, since it uses as much as digits as its factorization.

2778791227 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1382976, while the sum is 52.

The square root of 2778791227 is about 52714.2412162027. The cubic root of 2778791227 is about 1405.8920432857.

The spelling of 2778791227 in words is "two billion, seven hundred seventy-eight million, seven hundred ninety-one thousand, two hundred twenty-seven".