63980321 has 2 divisors, whose sum is σ = 63980322. Its totient is φ = 63980320.

The previous prime is 63980309. The next prime is 63980341. The reversal of 63980321 is 12308936.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63425296 + 555025 = 7964^2 + 745^2 .

It is a cyclic number.

It is not a de Polignac number, because 63980321 - 2¹⁸ = 63718177 is a prime.

It is not a weakly prime, because it can be changed into another prime (63980341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31990160 + 31990161.

It is an arithmetic number, because the mean of its divisors is an integer number (31990161).

Almost surely, 2^63980321 is an apocalyptic number.

It is an amenable number.

63980321 is a deficient number, since it is larger than the sum of its proper divisors (1).

63980321 is an equidigital number, since it uses as much as digits as its factorization.

63980321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 63980321 is about 7998.7699679388. The cubic root of 63980321 is about 399.9589978805.

The spelling of 63980321 in words is "sixty-three million, nine hundred eighty thousand, three hundred twenty-one".