63688513 has 8 divisors (see below), whose sum is σ = 76617920. Its totient is φ = 51716880.

The previous prime is 63688483. The next prime is 63688517. The reversal of 63688513 is 31588636.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 63688513 - 2¹³ = 63680321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63688517) 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, 239298 + ... + 239563.

It is an arithmetic number, because the mean of its divisors is an integer number (9577240).

Almost surely, 2^63688513 is an apocalyptic number.

It is an amenable number.

63688513 is a deficient number, since it is larger than the sum of its proper divisors (12929407).

63688513 is a wasteful number, since it uses less digits than its factorization.

63688513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 478887.

The product of its digits is 103680, while the sum is 40.

The square root of 63688513 is about 7980.5083171437. The cubic root of 63688513 is about 399.3500131147.

The spelling of 63688513 in words is "sixty-three million, six hundred eighty-eight thousand, five hundred thirteen".