1279977227 has 2 divisors, whose sum is σ = 1279977228. Its totient is φ = 1279977226.

The previous prime is 1279977217. The next prime is 1279977229. The reversal of 1279977227 is 7227799721.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1279977227 is a prime.

Together with 1279977229, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1279977229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 639988613 + 639988614.

It is an arithmetic number, because the mean of its divisors is an integer number (639988614).

Almost surely, 2^1279977227 is an apocalyptic number.

1279977227 is a deficient number, since it is larger than the sum of its proper divisors (1).

1279977227 is an equidigital number, since it uses as much as digits as its factorization.

1279977227 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1555848, while the sum is 53.

The square root of 1279977227 is about 35776.7693762307. The cubic root of 1279977227 is about 1085.7606074922.

The spelling of 1279977227 in words is "one billion, two hundred seventy-nine million, nine hundred seventy-seven thousand, two hundred twenty-seven".