64680047 has 4 divisors (see below), whose sum is σ = 68084280. Its totient is φ = 61275816.

The previous prime is 64680017. The next prime is 64680059. The reversal of 64680047 is 74008646.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74008646 = 2 ⋅37004323.

It is a cyclic number.

It is not a de Polignac number, because 64680047 - 2¹⁴ = 64663663 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 64679989 and 64680016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64680017) 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, 1702088 + ... + 1702125.

It is an arithmetic number, because the mean of its divisors is an integer number (17021070).

Almost surely, 2^64680047 is an apocalyptic number.

64680047 is a deficient number, since it is larger than the sum of its proper divisors (3404233).

64680047 is a wasteful number, since it uses less digits than its factorization.

64680047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3404232.

The product of its (nonzero) digits is 32256, while the sum is 35.

The square root of 64680047 is about 8042.3906271705. The cubic root of 64680047 is about 401.4117759429.

The spelling of 64680047 in words is "sixty-four million, six hundred eighty thousand, forty-seven".