63321257 has 2 divisors, whose sum is σ = 63321258. Its totient is φ = 63321256.

The previous prime is 63321253. The next prime is 63321259. The reversal of 63321257 is 75212336.

63321257 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61528336 + 1792921 = 7844^2 + 1339^2 .

It is a cyclic number.

It is not a de Polignac number, because 63321257 - 2² = 63321253 is a prime.

Together with 63321259, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (63321253) 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, 31660628 + 31660629.

It is an arithmetic number, because the mean of its divisors is an integer number (31660629).

Almost surely, 2^63321257 is an apocalyptic number.

It is an amenable number.

63321257 is a deficient number, since it is larger than the sum of its proper divisors (1).

63321257 is an equidigital number, since it uses as much as digits as its factorization.

63321257 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7560, while the sum is 29.

The square root of 63321257 is about 7957.4654884580. The cubic root of 63321257 is about 398.5809235923.

The spelling of 63321257 in words is "sixty-three million, three hundred twenty-one thousand, two hundred fifty-seven".