63729313 has 4 divisors (see below), whose sum is σ = 63833220. Its totient is φ = 63625408.

The previous prime is 63729301. The next prime is 63729359. The reversal of 63729313 is 31392736.

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 1760929 + 61968384 = 1327^2 + 7872^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63729313 is a prime.

It is a super-2 number, since 2×63729313² = 8122850670903938, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63729383) 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, 51028 + ... + 52261.

It is an arithmetic number, because the mean of its divisors is an integer number (15958305).

Almost surely, 2^63729313 is an apocalyptic number.

It is an amenable number.

63729313 is a deficient number, since it is larger than the sum of its proper divisors (103907).

63729313 is a wasteful number, since it uses less digits than its factorization.

63729313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103906.

The product of its digits is 20412, while the sum is 34.

The square root of 63729313 is about 7983.0641360320. The cubic root of 63729313 is about 399.4352718304.

The spelling of 63729313 in words is "sixty-three million, seven hundred twenty-nine thousand, three hundred thirteen".