63685361 has 2 divisors, whose sum is σ = 63685362. Its totient is φ = 63685360.

The previous prime is 63685357. The next prime is 63685381. The reversal of 63685361 is 16358636.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63361600 + 323761 = 7960^2 + 569^2 .

It is a cyclic number.

It is not a de Polignac number, because 63685361 - 2² = 63685357 is a prime.

It is not a weakly prime, because it can be changed into another prime (63685301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31842680 + 31842681.

It is an arithmetic number, because the mean of its divisors is an integer number (31842681).

Almost surely, 2^63685361 is an apocalyptic number.

It is an amenable number.

63685361 is a deficient number, since it is larger than the sum of its proper divisors (1).

63685361 is an equidigital number, since it uses as much as digits as its factorization.

63685361 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 77760, while the sum is 38.

The square root of 63685361 is about 7980.3108335453. The cubic root of 63685361 is about 399.3434249460.

It can be divided in two parts, 63685 and 361, that added together give a palindrome (64046).

The spelling of 63685361 in words is "sixty-three million, six hundred eighty-five thousand, three hundred sixty-one".