63868457 has 2 divisors, whose sum is σ = 63868458. Its totient is φ = 63868456.

The previous prime is 63868451. The next prime is 63868477. The reversal of 63868457 is 75486836.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 56190016 + 7678441 = 7496^2 + 2771^2 .

It is a cyclic number.

It is not a de Polignac number, because 63868457 - 2⁶ = 63868393 is a prime.

It is not a weakly prime, because it can be changed into another prime (63868451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31934228 + 31934229.

It is an arithmetic number, because the mean of its divisors is an integer number (31934229).

Almost surely, 2^63868457 is an apocalyptic number.

It is an amenable number.

63868457 is a deficient number, since it is larger than the sum of its proper divisors (1).

63868457 is an equidigital number, since it uses as much as digits as its factorization.

63868457 is an evil number, because the sum of its binary digits is even.

The product of its digits is 967680, while the sum is 47.

The square root of 63868457 is about 7991.7743336508. The cubic root of 63868457 is about 399.7257641130.

The spelling of 63868457 in words is "sixty-three million, eight hundred sixty-eight thousand, four hundred fifty-seven".