64042847 has 4 divisors (see below), whose sum is σ = 69864936. Its totient is φ = 58220760.

The previous prime is 64042843. The next prime is 64042871. The reversal of 64042847 is 74824046.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 64042847 - 2² = 64042843 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64042843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2911028 + ... + 2911049.

It is an arithmetic number, because the mean of its divisors is an integer number (17466234).

Almost surely, 2^64042847 is an apocalyptic number.

64042847 is a deficient number, since it is larger than the sum of its proper divisors (5822089).

64042847 is a wasteful number, since it uses less digits than its factorization.

64042847 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5822088.

The product of its (nonzero) digits is 43008, while the sum is 35.

The square root of 64042847 is about 8002.6774894406. The cubic root of 64042847 is about 400.0892446703.

The spelling of 64042847 in words is "sixty-four million, forty-two thousand, eight hundred forty-seven".