63745321 has 4 divisors (see below), whose sum is σ = 63763200. Its totient is φ = 63727444.

The previous prime is 63745313. The next prime is 63745343. The reversal of 63745321 is 12354736.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 63745321 - 2³ = 63745313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63745621) 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, 1561 + ... + 11398.

It is an arithmetic number, because the mean of its divisors is an integer number (15940800).

Almost surely, 2^63745321 is an apocalyptic number.

It is an amenable number.

63745321 is a deficient number, since it is larger than the sum of its proper divisors (17879).

63745321 is a wasteful number, since it uses less digits than its factorization.

63745321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17878.

The product of its digits is 15120, while the sum is 31.

The square root of 63745321 is about 7984.0666956132. The cubic root of 63745321 is about 399.4687133988.

The spelling of 63745321 in words is "sixty-three million, seven hundred forty-five thousand, three hundred twenty-one".