63989351 has 2 divisors, whose sum is σ = 63989352. Its totient is φ = 63989350.

The previous prime is 63989329. The next prime is 63989353. The reversal of 63989351 is 15398936.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 63989351 - 2⁶ = 63989287 is a prime.

Together with 63989353, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63989353) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31994675 + 31994676.

It is an arithmetic number, because the mean of its divisors is an integer number (31994676).

Almost surely, 2^63989351 is an apocalyptic number.

63989351 is a deficient number, since it is larger than the sum of its proper divisors (1).

63989351 is an equidigital number, since it uses as much as digits as its factorization.

63989351 is an evil number, because the sum of its binary digits is even.

The product of its digits is 174960, while the sum is 44.

The square root of 63989351 is about 7999.3344098119. The cubic root of 63989351 is about 399.9778133527.

It can be divided in two parts, 6398935 and 1, that added together give a palindrome (6398936).

The spelling of 63989351 in words is "sixty-three million, nine hundred eighty-nine thousand, three hundred fifty-one".