63131993 has 8 divisors (see below), whose sum is σ = 64491840. Its totient is φ = 61785360.

The previous prime is 63131963. The next prime is 63132001. The reversal of 63131993 is 39913136.

63131993 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63131993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63131963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6671 + ... + 13067.

It is an arithmetic number, because the mean of its divisors is an integer number (8061480).

Almost surely, 2^63131993 is an apocalyptic number.

It is an amenable number.

63131993 is a deficient number, since it is larger than the sum of its proper divisors (1359847).

63131993 is a wasteful number, since it uses less digits than its factorization.

63131993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6607.

The product of its digits is 13122, while the sum is 35.

The square root of 63131993 is about 7945.5643600691. The cubic root of 63131993 is about 398.1834146161.

The spelling of 63131993 in words is "sixty-three million, one hundred thirty-one thousand, nine hundred ninety-three".