63681101 has 4 divisors (see below), whose sum is σ = 69470304. Its totient is φ = 57891900.

The previous prime is 63681091. The next prime is 63681109. The reversal of 63681101 is 10118636.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a de Polignac number, because none of the positive numbers 2^k-63681101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63681109) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2894585 + ... + 2894606.

It is an arithmetic number, because the mean of its divisors is an integer number (17367576).

Almost surely, 2^63681101 is an apocalyptic number.

It is an amenable number.

63681101 is a deficient number, since it is larger than the sum of its proper divisors (5789203).

63681101 is a wasteful number, since it uses less digits than its factorization.

63681101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5789202.

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 63681101 is about 7980.0439221849. The cubic root of 63681101 is about 399.3345205400.

Adding to 63681101 its reverse (10118636), we get a palindrome (73799737).

The spelling of 63681101 in words is "sixty-three million, six hundred eighty-one thousand, one hundred one".