63881017 has 4 divisors (see below), whose sum is σ = 63912996. Its totient is φ = 63849040.

The previous prime is 63881009. The next prime is 63881039. The reversal of 63881017 is 71018836.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 31573161 + 32307856 = 5619^2 + 5684^2 .

It is a cyclic number.

It is not a de Polignac number, because 63881017 - 2³ = 63881009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63891017) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12778 + ... + 17059.

It is an arithmetic number, because the mean of its divisors is an integer number (15978249).

Almost surely, 2^63881017 is an apocalyptic number.

It is an amenable number.

63881017 is a deficient number, since it is larger than the sum of its proper divisors (31979).

63881017 is a wasteful number, since it uses less digits than its factorization.

63881017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31978.

The product of its (nonzero) digits is 8064, while the sum is 34.

The square root of 63881017 is about 7992.5601029958. The cubic root of 63881017 is about 399.7519649784.

The spelling of 63881017 in words is "sixty-three million, eight hundred eighty-one thousand, seventeen".