64724287 has 8 divisors (see below), whose sum is σ = 68890176. Its totient is φ = 60598272.

The previous prime is 64724269. The next prime is 64724291. The reversal of 64724287 is 78242746.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 64724287 - 2¹¹ = 64722239 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 (64724227) 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 7 ways as a sum of consecutive naturals, for example, 6583 + ... + 13144.

It is an arithmetic number, because the mean of its divisors is an integer number (8611272).

Almost surely, 2^64724287 is an apocalyptic number.

64724287 is a deficient number, since it is larger than the sum of its proper divisors (4165889).

64724287 is a wasteful number, since it uses less digits than its factorization.

64724287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19937.

The product of its digits is 150528, while the sum is 40.

The square root of 64724287 is about 8045.1405829855. The cubic root of 64724287 is about 401.5032745864.

The spelling of 64724287 in words is "sixty-four million, seven hundred twenty-four thousand, two hundred eighty-seven".