63509947 has 2 divisors, whose sum is σ = 63509948. Its totient is φ = 63509946.

The previous prime is 63509921. The next prime is 63509981. The reversal of 63509947 is 74990536.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 63509947 - 2⁷ = 63509819 is a prime.

It is not a weakly prime, because it can be changed into another prime (63509987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31754973 + 31754974.

It is an arithmetic number, because the mean of its divisors is an integer number (31754974).

Almost surely, 2^63509947 is an apocalyptic number.

63509947 is a deficient number, since it is larger than the sum of its proper divisors (1).

63509947 is an equidigital number, since it uses as much as digits as its factorization.

63509947 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 204120, while the sum is 43.

The square root of 63509947 is about 7969.3128311041. The cubic root of 63509947 is about 398.9764392928.

The spelling of 63509947 in words is "sixty-three million, five hundred nine thousand, nine hundred forty-seven".