63746321 has 8 divisors (see below), whose sum is σ = 66034920. Its totient is φ = 61463808.

The previous prime is 63746299. The next prime is 63746341. The reversal of 63746321 is 12364736.

It can be written as a sum of positive squares in 4 ways, for example, as 16974400 + 46771921 = 4120^2 + 6839^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 63746321 - 2⁶ = 63746257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63746341) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34985 + ... + 36761.

It is an arithmetic number, because the mean of its divisors is an integer number (8254365).

Almost surely, 2^63746321 is an apocalyptic number.

It is an amenable number.

63746321 is a deficient number, since it is larger than the sum of its proper divisors (2288599).

63746321 is a wasteful number, since it uses less digits than its factorization.

63746321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3043.

The product of its digits is 18144, while the sum is 32.

The square root of 63746321 is about 7984.1293200950. The cubic root of 63746321 is about 399.4708022665.

The spelling of 63746321 in words is "sixty-three million, seven hundred forty-six thousand, three hundred twenty-one".