63983321 has 2 divisors, whose sum is σ = 63983322. Its totient is φ = 63983320.

The previous prime is 63983303. The next prime is 63983333. The reversal of 63983321 is 12338936.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49505296 + 14478025 = 7036^2 + 3805^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63983321 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (63983341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31991660 + 31991661.

It is an arithmetic number, because the mean of its divisors is an integer number (31991661).

Almost surely, 2^63983321 is an apocalyptic number.

It is an amenable number.

63983321 is a deficient number, since it is larger than the sum of its proper divisors (1).

63983321 is an equidigital number, since it uses as much as digits as its factorization.

63983321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23328, while the sum is 35.

The square root of 63983321 is about 7998.9574945739. The cubic root of 63983321 is about 399.9652490644.

The spelling of 63983321 in words is "sixty-three million, nine hundred eighty-three thousand, three hundred twenty-one".