1427776117 has 2 divisors, whose sum is σ = 1427776118. Its totient is φ = 1427776116.

The previous prime is 1427776099. The next prime is 1427776159. The reversal of 1427776117 is 7116777241.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 727326961 + 700449156 = 26969^2 + 26466^2 .

It is a cyclic number.

It is not a de Polignac number, because 1427776117 - 2¹⁵ = 1427743349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1427776817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 713888058 + 713888059.

It is an arithmetic number, because the mean of its divisors is an integer number (713888059).

Almost surely, 2^1427776117 is an apocalyptic number.

It is an amenable number.

1427776117 is a deficient number, since it is larger than the sum of its proper divisors (1).

1427776117 is an equidigital number, since it uses as much as digits as its factorization.

1427776117 is an evil number, because the sum of its binary digits is even.

The product of its digits is 115248, while the sum is 43.

The square root of 1427776117 is about 37785.9248530455. The cubic root of 1427776117 is about 1126.0388407867.

The spelling of 1427776117 in words is "one billion, four hundred twenty-seven million, seven hundred seventy-six thousand, one hundred seventeen".