63686534 has 4 divisors (see below), whose sum is σ = 95529804. Its totient is φ = 31843266.

The previous prime is 63686533. The next prime is 63686593. The reversal of 63686534 is 43568636.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×63686534² = 8111949225866312, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 63686491 and 63686500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63686533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15921632 + ... + 15921635.

It is an arithmetic number, because the mean of its divisors is an integer number (23882451).

Almost surely, 2^63686534 is an apocalyptic number.

63686534 is a deficient number, since it is larger than the sum of its proper divisors (31843270).

63686534 is a wasteful number, since it uses less digits than its factorization.

63686534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31843269.

The product of its digits is 311040, while the sum is 41.

The square root of 63686534 is about 7980.3843265848. The cubic root of 63686534 is about 399.3458767233.

The spelling of 63686534 in words is "sixty-three million, six hundred eighty-six thousand, five hundred thirty-four".