63723109 has 4 divisors (see below), whose sum is σ = 63739116. Its totient is φ = 63707104.

The previous prime is 63723071. The next prime is 63723137. The reversal of 63723109 is 90132736.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 10870209 + 52852900 = 3297^2 + 7270^2 .

It is a cyclic number.

It is not a de Polignac number, because 63723109 - 2⁹ = 63722597 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 (63723809) 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, 3147 + ... + 11719.

It is an arithmetic number, because the mean of its divisors is an integer number (15934779).

Almost surely, 2^63723109 is an apocalyptic number.

It is an amenable number.

63723109 is a deficient number, since it is larger than the sum of its proper divisors (16007).

63723109 is an equidigital number, since it uses as much as digits as its factorization.

63723109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16006.

The product of its (nonzero) digits is 6804, while the sum is 31.

The square root of 63723109 is about 7982.6755539731. The cubic root of 63723109 is about 399.4223098368.

The spelling of 63723109 in words is "sixty-three million, seven hundred twenty-three thousand, one hundred nine".