427663777 has 2 divisors, whose sum is σ = 427663778. Its totient is φ = 427663776.

The previous prime is 427663751. The next prime is 427663793. The reversal of 427663777 is 777366724.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 344325136 + 83338641 = 18556^2 + 9129^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-427663777 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 427663777.

It is not a weakly prime, because it can be changed into another prime (427663727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213831888 + 213831889.

It is an arithmetic number, because the mean of its divisors is an integer number (213831889).

Almost surely, 2^427663777 is an apocalyptic number.

It is an amenable number.

427663777 is a deficient number, since it is larger than the sum of its proper divisors (1).

427663777 is an equidigital number, since it uses as much as digits as its factorization.

427663777 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2074464, while the sum is 49.

The square root of 427663777 is about 20680.0332930100. The cubic root of 427663777 is about 753.4148148263.

The spelling of 427663777 in words is "four hundred twenty-seven million, six hundred sixty-three thousand, seven hundred seventy-seven".