63685429 has 2 divisors, whose sum is σ = 63685430. Its totient is φ = 63685428.

The previous prime is 63685411. The next prime is 63685441. The reversal of 63685429 is 92458636.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 63632529 + 52900 = 7977^2 + 230^2 .

It is a cyclic number.

It is not a de Polignac number, because 63685429 - 2⁷ = 63685301 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63685469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31842714 + 31842715.

It is an arithmetic number, because the mean of its divisors is an integer number (31842715).

Almost surely, 2^63685429 is an apocalyptic number.

It is an amenable number.

63685429 is a deficient number, since it is larger than the sum of its proper divisors (1).

63685429 is an equidigital number, since it uses as much as digits as its factorization.

63685429 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 311040, while the sum is 43.

The square root of 63685429 is about 7980.3150940298. The cubic root of 63685429 is about 399.3435670788.

The spelling of 63685429 in words is "sixty-three million, six hundred eighty-five thousand, four hundred twenty-nine".