427663289 has 2 divisors, whose sum is σ = 427663290. Its totient is φ = 427663288.

The previous prime is 427663283. The next prime is 427663331. The reversal of 427663289 is 982366724.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 391723264 + 35940025 = 19792^2 + 5995^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-427663289 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (427663283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213831644 + 213831645.

It is an arithmetic number, because the mean of its divisors is an integer number (213831645).

Almost surely, 2^427663289 is an apocalyptic number.

It is an amenable number.

427663289 is a deficient number, since it is larger than the sum of its proper divisors (1).

427663289 is an equidigital number, since it uses as much as digits as its factorization.

427663289 is an evil number, because the sum of its binary digits is even.

The product of its digits is 870912, while the sum is 47.

The square root of 427663289 is about 20680.0214941861. The cubic root of 427663289 is about 753.4145282565.

The spelling of 427663289 in words is "four hundred twenty-seven million, six hundred sixty-three thousand, two hundred eighty-nine".