63215687 has 2 divisors, whose sum is σ = 63215688. Its totient is φ = 63215686.

The previous prime is 63215681. The next prime is 63215689. The reversal of 63215687 is 78651236.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 63215687 - 2¹⁰ = 63214663 is a prime.

Together with 63215689, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 63215687.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63215681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31607843 + 31607844.

It is an arithmetic number, because the mean of its divisors is an integer number (31607844).

Almost surely, 2^63215687 is an apocalyptic number.

63215687 is a deficient number, since it is larger than the sum of its proper divisors (1).

63215687 is an equidigital number, since it uses as much as digits as its factorization.

63215687 is an evil number, because the sum of its binary digits is even.

The product of its digits is 60480, while the sum is 38.

The square root of 63215687 is about 7950.8293278123. The cubic root of 63215687 is about 398.3592939942.

The spelling of 63215687 in words is "sixty-three million, two hundred fifteen thousand, six hundred eighty-seven".