63881887 has 8 divisors (see below), whose sum is σ = 65259056. Its totient is φ = 62517312.

The previous prime is 63881827. The next prime is 63881891. The reversal of 63881887 is 78818836.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63881887 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 63881887.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63881827) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7483 + ... + 13555.

It is an arithmetic number, because the mean of its divisors is an integer number (8157382).

Almost surely, 2^63881887 is an apocalyptic number.

63881887 is a gapful number since it is divisible by the number (67) formed by its first and last digit.

63881887 is a deficient number, since it is larger than the sum of its proper divisors (1377169).

63881887 is a wasteful number, since it uses less digits than its factorization.

63881887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6297.

The product of its digits is 516096, while the sum is 49.

The square root of 63881887 is about 7992.6145284256. The cubic root of 63881887 is about 399.7537797200.

The spelling of 63881887 in words is "sixty-three million, eight hundred eighty-one thousand, eight hundred eighty-seven".