1227793139 has 2 divisors, whose sum is σ = 1227793140. Its totient is φ = 1227793138.

The previous prime is 1227793121. The next prime is 1227793169. The reversal of 1227793139 is 9313977221.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1227793139 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1227793139.

It is not a weakly prime, because it can be changed into another prime (1227793169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 613896569 + 613896570.

It is an arithmetic number, because the mean of its divisors is an integer number (613896570).

Almost surely, 2^1227793139 is an apocalyptic number.

1227793139 is a deficient number, since it is larger than the sum of its proper divisors (1).

1227793139 is an equidigital number, since it uses as much as digits as its factorization.

1227793139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 142884, while the sum is 44.

The square root of 1227793139 is about 35039.8792663445. The cubic root of 1227793139 is about 1070.8000942161.

The spelling of 1227793139 in words is "one billion, two hundred twenty-seven million, seven hundred ninety-three thousand, one hundred thirty-nine".