63831947 has 2 divisors, whose sum is σ = 63831948. Its totient is φ = 63831946.

The previous prime is 63831907. The next prime is 63832033. The reversal of 63831947 is 74913836.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63831947 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (63831907) 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, 31915973 + 31915974.

It is an arithmetic number, because the mean of its divisors is an integer number (31915974).

Almost surely, 2^63831947 is an apocalyptic number.

63831947 is a deficient number, since it is larger than the sum of its proper divisors (1).

63831947 is an equidigital number, since it uses as much as digits as its factorization.

63831947 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108864, while the sum is 41.

The square root of 63831947 is about 7989.4897834593. The cubic root of 63831947 is about 399.6495826923.

The spelling of 63831947 in words is "sixty-three million, eight hundred thirty-one thousand, nine hundred forty-seven".