63708257 has 2 divisors, whose sum is σ = 63708258. Its totient is φ = 63708256.

The previous prime is 63708221. The next prime is 63708289. The reversal of 63708257 is 75280736.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49336576 + 14371681 = 7024^2 + 3791^2 .

It is a cyclic number.

It is not a de Polignac number, because 63708257 - 2¹⁰ = 63707233 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 63708257.

It is not a weakly prime, because it can be changed into another prime (63758257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31854128 + 31854129.

It is an arithmetic number, because the mean of its divisors is an integer number (31854129).

Almost surely, 2^63708257 is an apocalyptic number.

It is an amenable number.

63708257 is a deficient number, since it is larger than the sum of its proper divisors (1).

63708257 is an equidigital number, since it uses as much as digits as its factorization.

63708257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 70560, while the sum is 38.

The square root of 63708257 is about 7981.7452352227. The cubic root of 63708257 is about 399.3912761916.

The spelling of 63708257 in words is "sixty-three million, seven hundred eight thousand, two hundred fifty-seven".