63698071 has 2 divisors, whose sum is σ = 63698072. Its totient is φ = 63698070.

The previous prime is 63698059. The next prime is 63698077. The reversal of 63698071 is 17089636.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63698071 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63698077) 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, 31849035 + 31849036.

It is an arithmetic number, because the mean of its divisors is an integer number (31849036).

Almost surely, 2^63698071 is an apocalyptic number.

63698071 is a deficient number, since it is larger than the sum of its proper divisors (1).

63698071 is an equidigital number, since it uses as much as digits as its factorization.

63698071 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54432, while the sum is 40.

The square root of 63698071 is about 7981.1071287134. The cubic root of 63698071 is about 399.3699894878.

The spelling of 63698071 in words is "sixty-three million, six hundred ninety-eight thousand, seventy-one".