63761993 has 4 divisors (see below), whose sum is σ = 63779460. Its totient is φ = 63744528.

The previous prime is 63761977. The next prime is 63762059. The reversal of 63761993 is 39916736.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 47375689 + 16386304 = 6883^2 + 4048^2 .

It is a cyclic number.

It is not a de Polignac number, because 63761993 - 2⁴ = 63761977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63761903) 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, 938 + ... + 11331.

It is an arithmetic number, because the mean of its divisors is an integer number (15944865).

Almost surely, 2^63761993 is an apocalyptic number.

It is an amenable number.

63761993 is a deficient number, since it is larger than the sum of its proper divisors (17467).

63761993 is a wasteful number, since it uses less digits than its factorization.

63761993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17466.

The product of its digits is 183708, while the sum is 44.

The square root of 63761993 is about 7985.1107068093. The cubic root of 63761993 is about 399.5035361474.

The spelling of 63761993 in words is "sixty-three million, seven hundred sixty-one thousand, nine hundred ninety-three".