63945617 has 2 divisors, whose sum is σ = 63945618. Its totient is φ = 63945616.

The previous prime is 63945611. The next prime is 63945649. The reversal of 63945617 is 71654936.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 33651601 + 30294016 = 5801^2 + 5504^2 .

It is a cyclic number.

It is not a de Polignac number, because 63945617 - 2¹⁰ = 63944593 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (63945611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31972808 + 31972809.

It is an arithmetic number, because the mean of its divisors is an integer number (31972809).

Almost surely, 2^63945617 is an apocalyptic number.

It is an amenable number.

63945617 is a deficient number, since it is larger than the sum of its proper divisors (1).

63945617 is an equidigital number, since it uses as much as digits as its factorization.

63945617 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 136080, while the sum is 41.

The square root of 63945617 is about 7996.6003401446. The cubic root of 63945617 is about 399.8866699771.

The spelling of 63945617 in words is "sixty-three million, nine hundred forty-five thousand, six hundred seventeen".