63684967 has 2 divisors, whose sum is σ = 63684968. Its totient is φ = 63684966.

The previous prime is 63684961. The next prime is 63684989. The reversal of 63684967 is 76948636.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 63684967 - 2¹¹ = 63682919 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 63684967.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63684961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31842483 + 31842484.

It is an arithmetic number, because the mean of its divisors is an integer number (31842484).

Almost surely, 2^63684967 is an apocalyptic number.

63684967 is a deficient number, since it is larger than the sum of its proper divisors (1).

63684967 is an equidigital number, since it uses as much as digits as its factorization.

63684967 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1306368, while the sum is 49.

The square root of 63684967 is about 7980.2861477518. The cubic root of 63684967 is about 399.3426014096.

The spelling of 63684967 in words is "sixty-three million, six hundred eighty-four thousand, nine hundred sixty-seven".