1227919777673 has 2 divisors, whose sum is σ = 1227919777674. Its totient is φ = 1227919777672.

The previous prime is 1227919777633. The next prime is 1227919777691. The reversal of 1227919777673 is 3767779197221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 632195141449 + 595724636224 = 795107^2 + 771832^2 .

It is a cyclic number.

It is not a de Polignac number, because 1227919777673 - 2²⁰ = 1227918729097 is a prime.

It is not a weakly prime, because it can be changed into another prime (1227919777603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 613959888836 + 613959888837.

It is an arithmetic number, because the mean of its divisors is an integer number (613959888837).

Almost surely, 2^{1227919777673} is an apocalyptic number.

It is an amenable number.

1227919777673 is a deficient number, since it is larger than the sum of its proper divisors (1).

1227919777673 is an equidigital number, since it uses as much as digits as its factorization.

1227919777673 is an evil number, because the sum of its binary digits is even.

The product of its digits is 98018424, while the sum is 68.

The spelling of 1227919777673 in words is "one trillion, two hundred twenty-seven billion, nine hundred nineteen million, seven hundred seventy-seven thousand, six hundred seventy-three".