63506257 has 2 divisors, whose sum is σ = 63506258. Its totient is φ = 63506256.

The previous prime is 63506251. The next prime is 63506279. The reversal of 63506257 is 75260536.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63504961 + 1296 = 7969^2 + 36^2 .

It is a cyclic number.

It is not a de Polignac number, because 63506257 - 2³ = 63506249 is a prime.

It is not a weakly prime, because it can be changed into another prime (63506251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31753128 + 31753129.

It is an arithmetic number, because the mean of its divisors is an integer number (31753129).

Almost surely, 2^63506257 is an apocalyptic number.

It is an amenable number.

63506257 is a deficient number, since it is larger than the sum of its proper divisors (1).

63506257 is an equidigital number, since it uses as much as digits as its factorization.

63506257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 37800, while the sum is 34.

The square root of 63506257 is about 7969.0813146811. The cubic root of 63506257 is about 398.9687121485.

The spelling of 63506257 in words is "sixty-three million, five hundred six thousand, two hundred fifty-seven".