63988189 has 2 divisors, whose sum is σ = 63988190. Its totient is φ = 63988188.

The previous prime is 63988157. The next prime is 63988217. The reversal of 63988189 is 98188936.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 62647225 + 1340964 = 7915^2 + 1158^2 .

It is a cyclic number.

It is not a de Polignac number, because 63988189 - 2⁵ = 63988157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63988489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31994094 + 31994095.

It is an arithmetic number, because the mean of its divisors is an integer number (31994095).

Almost surely, 2^63988189 is an apocalyptic number.

It is an amenable number.

63988189 is a deficient number, since it is larger than the sum of its proper divisors (1).

63988189 is an equidigital number, since it uses as much as digits as its factorization.

63988189 is an evil number, because the sum of its binary digits is even.

The product of its digits is 746496, while the sum is 52.

The square root of 63988189 is about 7999.2617784393. The cubic root of 63988189 is about 399.9753922362.

The spelling of 63988189 in words is "sixty-three million, nine hundred eighty-eight thousand, one hundred eighty-nine".