63988871 has 2 divisors, whose sum is σ = 63988872. Its totient is φ = 63988870.

The previous prime is 63988831. The next prime is 63988879. The reversal of 63988871 is 17888936.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63988871 is a prime.

It is a super-2 number, since 2×63988871² = 8189151223709282, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63988879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31994435 + 31994436.

It is an arithmetic number, because the mean of its divisors is an integer number (31994436).

Almost surely, 2^63988871 is an apocalyptic number.

63988871 is a deficient number, since it is larger than the sum of its proper divisors (1).

63988871 is an equidigital number, since it uses as much as digits as its factorization.

63988871 is an evil number, because the sum of its binary digits is even.

The product of its digits is 580608, while the sum is 50.

The square root of 63988871 is about 7999.3044072594. The cubic root of 63988871 is about 399.9768132393.

The spelling of 63988871 in words is "sixty-three million, nine hundred eighty-eight thousand, eight hundred seventy-one".