63684331 has 2 divisors, whose sum is σ = 63684332. Its totient is φ = 63684330.

The previous prime is 63684317. The next prime is 63684347. The reversal of 63684331 is 13348636.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 63684331 - 2¹⁵ = 63651563 is a prime.

It is a super-2 number, since 2×63684331² = 8111388029835122, which contains 22 as substring.

It is equal to p_3767443 and since 63684331 and 3767443 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (63684311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31842165 + 31842166.

It is an arithmetic number, because the mean of its divisors is an integer number (31842166).

Almost surely, 2^63684331 is an apocalyptic number.

63684331 is a deficient number, since it is larger than the sum of its proper divisors (1).

63684331 is an equidigital number, since it uses as much as digits as its factorization.

63684331 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31104, while the sum is 34.

The square root of 63684331 is about 7980.2462994572. The cubic root of 63684331 is about 399.3412720392.

The spelling of 63684331 in words is "sixty-three million, six hundred eighty-four thousand, three hundred thirty-one".