64347287 has 4 divisors (see below), whose sum is σ = 64368480. Its totient is φ = 64326096.

The previous prime is 64347263. The next prime is 64347299. The reversal of 64347287 is 78274346.

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-64347287 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 (64343287) 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, 5087 + ... + 12432.

It is an arithmetic number, because the mean of its divisors is an integer number (16092120).

Almost surely, 2^64347287 is an apocalyptic number.

64347287 is a deficient number, since it is larger than the sum of its proper divisors (21193).

64347287 is a wasteful number, since it uses less digits than its factorization.

64347287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21192.

The product of its digits is 225792, while the sum is 41.

The square root of 64347287 is about 8021.6760717446. The cubic root of 64347287 is about 400.7222098310.

The spelling of 64347287 in words is "sixty-four million, three hundred forty-seven thousand, two hundred eighty-seven".