63805457 has 2 divisors, whose sum is σ = 63805458. Its totient is φ = 63805456.

The previous prime is 63805447. The next prime is 63805459. The reversal of 63805457 is 75450836.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42562576 + 21242881 = 6524^2 + 4609^2 .

It is a cyclic number.

It is not a de Polignac number, because 63805457 - 2¹⁸ = 63543313 is a prime.

It is a super-2 number, since 2×63805457² = 8142272685957698, which contains 22 as substring.

Together with 63805459, it forms a pair of twin primes.

It is a Chen prime.

It is a pancake number, because a pancake can be divided into 63805457 parts by 11296 straight cuts.

It is a self number, because there is not a number n which added to its sum of digits gives 63805457.

It is not a weakly prime, because it can be changed into another prime (63805459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31902728 + 31902729.

It is an arithmetic number, because the mean of its divisors is an integer number (31902729).

Almost surely, 2^63805457 is an apocalyptic number.

It is an amenable number.

63805457 is a deficient number, since it is larger than the sum of its proper divisors (1).

63805457 is an equidigital number, since it uses as much as digits as its factorization.

63805457 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 100800, while the sum is 38.

The square root of 63805457 is about 7987.8318084446. The cubic root of 63805457 is about 399.5942907224.

The spelling of 63805457 in words is "sixty-three million, eight hundred five thousand, four hundred fifty-seven".