63693689 has 2 divisors, whose sum is σ = 63693690. Its totient is φ = 63693688.

The previous prime is 63693677. The next prime is 63693697. The reversal of 63693689 is 98639636.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 62410000 + 1283689 = 7900^2 + 1133^2 .

It is a cyclic number.

It is not a de Polignac number, because 63693689 - 2⁴ = 63693673 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (63693659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31846844 + 31846845.

It is an arithmetic number, because the mean of its divisors is an integer number (31846845).

Almost surely, 2^63693689 is an apocalyptic number.

It is an amenable number.

63693689 is a deficient number, since it is larger than the sum of its proper divisors (1).

63693689 is an equidigital number, since it uses as much as digits as its factorization.

63693689 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1259712, while the sum is 50.

The square root of 63693689 is about 7980.8326006752. The cubic root of 63693689 is about 399.3608312857.

The spelling of 63693689 in words is "sixty-three million, six hundred ninety-three thousand, six hundred eighty-nine".