63999457 has 2 divisors, whose sum is σ = 63999458. Its totient is φ = 63999456.

The previous prime is 63999443. The next prime is 63999473. The reversal of 63999457 is 75499936.

63999457 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 52548001 + 11451456 = 7249^2 + 3384^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63999457 is a prime.

It is not a weakly prime, because it can be changed into another prime (63999427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31999728 + 31999729.

It is an arithmetic number, because the mean of its divisors is an integer number (31999729).

Almost surely, 2^63999457 is an apocalyptic number.

It is an amenable number.

63999457 is a deficient number, since it is larger than the sum of its proper divisors (1).

63999457 is an equidigital number, since it uses as much as digits as its factorization.

63999457 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1837080, while the sum is 52.

The square root of 63999457 is about 7999.9660624280. The cubic root of 63999457 is about 399.9988687468.

The spelling of 63999457 in words is "sixty-three million, nine hundred ninety-nine thousand, four hundred fifty-seven".