63401257 has 2 divisors, whose sum is σ = 63401258. Its totient is φ = 63401256.

The previous prime is 63401243. The next prime is 63401287. The reversal of 63401257 is 75210436.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 54997056 + 8404201 = 7416^2 + 2899^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63401257 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (63401227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31700628 + 31700629.

It is an arithmetic number, because the mean of its divisors is an integer number (31700629).

Almost surely, 2^63401257 is an apocalyptic number.

It is an amenable number.

63401257 is a deficient number, since it is larger than the sum of its proper divisors (1).

63401257 is an equidigital number, since it uses as much as digits as its factorization.

63401257 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 63401257 is about 7962.4906279380. The cubic root of 63401257 is about 398.7487085056.

The spelling of 63401257 in words is "sixty-three million, four hundred one thousand, two hundred fifty-seven".