64497947 has 2 divisors, whose sum is σ = 64497948. Its totient is φ = 64497946.

The previous prime is 64497941. The next prime is 64497967. The reversal of 64497947 is 74979446.

64497947 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 64497947 - 2¹⁴ = 64481563 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 64497895 and 64497904.

It is not a weakly prime, because it can be changed into another prime (64497941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32248973 + 32248974.

It is an arithmetic number, because the mean of its divisors is an integer number (32248974).

Almost surely, 2^64497947 is an apocalyptic number.

64497947 is a deficient number, since it is larger than the sum of its proper divisors (1).

64497947 is an equidigital number, since it uses as much as digits as its factorization.

64497947 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1524096, while the sum is 50.

The square root of 64497947 is about 8031.0613868903. The cubic root of 64497947 is about 401.0347107098.

The spelling of 64497947 in words is "sixty-four million, four hundred ninety-seven thousand, nine hundred forty-seven".