63881997 has 8 divisors (see below), whose sum is σ = 85380960. Its totient is φ = 42485520.

The previous prime is 63881981. The next prime is 63882011. The reversal of 63881997 is 79918836.

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

It is not a de Polignac number, because 63881997 - 2⁴ = 63881981 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63881927) 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, 24154 + ... + 26667.

It is an arithmetic number, because the mean of its divisors is an integer number (10672620).

Almost surely, 2^63881997 is an apocalyptic number.

It is an amenable number.

63881997 is a deficient number, since it is larger than the sum of its proper divisors (21498963).

63881997 is a wasteful number, since it uses less digits than its factorization.

63881997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51243.

The product of its digits is 653184, while the sum is 51.

The square root of 63881997 is about 7992.6214097754. The cubic root of 63881997 is about 399.7540091690.

It can be divided in two parts, 6388 and 1997, that added together give a triangular number (8385 = T₁₂₉).

The spelling of 63881997 in words is "sixty-three million, eight hundred eighty-one thousand, nine hundred ninety-seven".