63685123 has 2 divisors, whose sum is σ = 63685124. Its totient is φ = 63685122.

The previous prime is 63685121. The next prime is 63685147. The reversal of 63685123 is 32158636.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 63685123 - 2¹ = 63685121 is a prime.

Together with 63685121, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (63685121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31842561 + 31842562.

It is an arithmetic number, because the mean of its divisors is an integer number (31842562).

Almost surely, 2^63685123 is an apocalyptic number.

63685123 is a deficient number, since it is larger than the sum of its proper divisors (1).

63685123 is an equidigital number, since it uses as much as digits as its factorization.

63685123 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25920, while the sum is 34.

The square root of 63685123 is about 7980.2959218315. The cubic root of 63685123 is about 399.3429274803.

The spelling of 63685123 in words is "sixty-three million, six hundred eighty-five thousand, one hundred twenty-three".