447786687769 has 2 divisors, whose sum is σ = 447786687770. Its totient is φ = 447786687768.

The previous prime is 447786687731. The next prime is 447786687773. The reversal of 447786687769 is 967786687744.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 326484246544 + 121302441225 = 571388^2 + 348285^2 .

It is a cyclic number.

It is not a de Polignac number, because 447786687769 - 2²⁵ = 447753133337 is a prime.

It is a super-2 number, since 2×447786687769² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (447786487769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 223893343884 + 223893343885.

It is an arithmetic number, because the mean of its divisors is an integer number (223893343885).

Almost surely, 2^447786687769 is an apocalyptic number.

It is an amenable number.

447786687769 is a deficient number, since it is larger than the sum of its proper divisors (1).

447786687769 is an equidigital number, since it uses as much as digits as its factorization.

447786687769 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4779565056, while the sum is 79.

The spelling of 447786687769 in words is "four hundred forty-seven billion, seven hundred eighty-six million, six hundred eighty-seven thousand, seven hundred sixty-nine".