63971587 has 8 divisors (see below), whose sum is σ = 64532160. Its totient is φ = 63413760.

The previous prime is 63971581. The next prime is 63971591. The reversal of 63971587 is 78517936.

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-63971587 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63971581) 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, 88614 + ... + 89332.

It is an arithmetic number, because the mean of its divisors is an integer number (8066520).

Almost surely, 2^63971587 is an apocalyptic number.

63971587 is a deficient number, since it is larger than the sum of its proper divisors (560573).

63971587 is a wasteful number, since it uses less digits than its factorization.

63971587 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1373.

The product of its digits is 317520, while the sum is 46.

The square root of 63971587 is about 7998.2239903619. The cubic root of 63971587 is about 399.9407974881.

The spelling of 63971587 in words is "sixty-three million, nine hundred seventy-one thousand, five hundred eighty-seven".