63799681 has 8 divisors (see below), whose sum is σ = 72000000. Its totient is φ = 55999440.

The previous prime is 63799679. The next prime is 63799787. The reversal of 63799681 is 18699736.

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 63799681 - 2¹ = 63799679 is a prime.

It is a super-2 number, since 2×63799681² = 8140798591403522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63799601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 99681 + ... + 100318.

It is an arithmetic number, because the mean of its divisors is an integer number (9000000).

Almost surely, 2^63799681 is an apocalyptic number.

It is an amenable number.

63799681 is a deficient number, since it is larger than the sum of its proper divisors (8200319).

63799681 is a wasteful number, since it uses less digits than its factorization.

63799681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200039.

The product of its digits is 489888, while the sum is 49.

The square root of 63799681 is about 7987.4702503358. The cubic root of 63799681 is about 399.5822325779.

The spelling of 63799681 in words is "sixty-three million, seven hundred ninety-nine thousand, six hundred eighty-one".