63766789 has 2 divisors, whose sum is σ = 63766790. Its totient is φ = 63766788.

The previous prime is 63766771. The next prime is 63766811. The reversal of 63766789 is 98766736.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36204289 + 27562500 = 6017^2 + 5250^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63766789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63766709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31883394 + 31883395.

It is an arithmetic number, because the mean of its divisors is an integer number (31883395).

Almost surely, 2^63766789 is an apocalyptic number.

It is an amenable number.

63766789 is a deficient number, since it is larger than the sum of its proper divisors (1).

63766789 is an equidigital number, since it uses as much as digits as its factorization.

63766789 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2286144, while the sum is 52.

The square root of 63766789 is about 7985.4110100858. The cubic root of 63766789 is about 399.5135524117.

The spelling of 63766789 in words is "sixty-three million, seven hundred sixty-six thousand, seven hundred eighty-nine".