63980309 has 2 divisors, whose sum is σ = 63980310. Its totient is φ = 63980308.

The previous prime is 63980303. The next prime is 63980321. The reversal of 63980309 is 90308936.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50268100 + 13712209 = 7090^2 + 3703^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63980309 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63980303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31990154 + 31990155.

It is an arithmetic number, because the mean of its divisors is an integer number (31990155).

Almost surely, 2^63980309 is an apocalyptic number.

It is an amenable number.

63980309 is a deficient number, since it is larger than the sum of its proper divisors (1).

63980309 is an equidigital number, since it uses as much as digits as its factorization.

63980309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34992, while the sum is 38.

The square root of 63980309 is about 7998.7692178235. The cubic root of 63980309 is about 399.9589728754.

The spelling of 63980309 in words is "sixty-three million, nine hundred eighty thousand, three hundred nine".