63989023697 has 2 divisors, whose sum is σ = 63989023698. Its totient is φ = 63989023696.

The previous prime is 63989023687. The next prime is 63989023759. The reversal of 63989023697 is 79632098936.

It is an a-pointer prime, because the next prime (63989023759) can be obtained adding 63989023697 to its sum of digits (62).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 59339011216 + 4650012481 = 243596^2 + 68191^2 .

It is a cyclic number.

It is not a de Polignac number, because 63989023697 - 2⁶ = 63989023633 is a prime.

It is not a weakly prime, because it can be changed into another prime (63989023687) 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, 31994511848 + 31994511849.

It is an arithmetic number, because the mean of its divisors is an integer number (31994511849).

Almost surely, 2^63989023697 is an apocalyptic number.

It is an amenable number.

63989023697 is a deficient number, since it is larger than the sum of its proper divisors (1).

63989023697 is an equidigital number, since it uses as much as digits as its factorization.

63989023697 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 26453952, while the sum is 62.

The spelling of 63989023697 in words is "sixty-three billion, nine hundred eighty-nine million, twenty-three thousand, six hundred ninety-seven".