63685847 has 2 divisors, whose sum is σ = 63685848. Its totient is φ = 63685846.

The previous prime is 63685763. The next prime is 63685849. The reversal of 63685847 is 74858636.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 63685847 - 2⁸ = 63685591 is a prime.

Together with 63685849, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63685849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31842923 + 31842924.

It is an arithmetic number, because the mean of its divisors is an integer number (31842924).

Almost surely, 2^63685847 is an apocalyptic number.

63685847 is a deficient number, since it is larger than the sum of its proper divisors (1).

63685847 is an equidigital number, since it uses as much as digits as its factorization.

63685847 is an evil number, because the sum of its binary digits is even.

The product of its digits is 967680, while the sum is 47.

The square root of 63685847 is about 7980.3412834289. The cubic root of 63685847 is about 399.3444407755.

The spelling of 63685847 in words is "sixty-three million, six hundred eighty-five thousand, eight hundred forty-seven".