64311287 has 4 divisors (see below), whose sum is σ = 64385496. Its totient is φ = 64237080.

The previous prime is 64311271. The next prime is 64311301. The reversal of 64311287 is 78211346.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78211346 = 2 ⋅39105673.

It is a cyclic number.

It is not a de Polignac number, because 64311287 - 2⁴ = 64311271 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 (64311787) 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, 35789 + ... + 37542.

It is an arithmetic number, because the mean of its divisors is an integer number (16096374).

Almost surely, 2^64311287 is an apocalyptic number.

64311287 is a deficient number, since it is larger than the sum of its proper divisors (74209).

64311287 is an equidigital number, since it uses as much as digits as its factorization.

64311287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74208.

The product of its digits is 8064, while the sum is 32.

The square root of 64311287 is about 8019.4318377302. The cubic root of 64311287 is about 400.6474659874.

The spelling of 64311287 in words is "sixty-four million, three hundred eleven thousand, two hundred eighty-seven".