64480727 has 4 divisors (see below), whose sum is σ = 64512960. Its totient is φ = 64448496.

The previous prime is 64480697. The next prime is 64480729. The reversal of 64480727 is 72708446.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64480727 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 (64480729) 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 in 3 ways as a sum of consecutive naturals, for example, 12902 + ... + 17187.

It is an arithmetic number, because the mean of its divisors is an integer number (16128240).

Almost surely, 2^64480727 is an apocalyptic number.

64480727 is a deficient number, since it is larger than the sum of its proper divisors (32233).

64480727 is a wasteful number, since it uses less digits than its factorization.

64480727 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32232.

The product of its (nonzero) digits is 75264, while the sum is 38.

The square root of 64480727 is about 8029.9892278882. The cubic root of 64480727 is about 400.9990174166. Note that the first 3 decimals are identical.

The spelling of 64480727 in words is "sixty-four million, four hundred eighty thousand, seven hundred twenty-seven".