64987211 has 4 divisors (see below), whose sum is σ = 65003400. Its totient is φ = 64971024.

The previous prime is 64987193. The next prime is 64987313. The reversal of 64987211 is 11278946.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64987211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64980211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2960 + ... + 11778.

It is an arithmetic number, because the mean of its divisors is an integer number (16250850).

Almost surely, 2^64987211 is an apocalyptic number.

64987211 is a deficient number, since it is larger than the sum of its proper divisors (16189).

64987211 is an equidigital number, since it uses as much as digits as its factorization.

64987211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16188.

The product of its digits is 24192, while the sum is 38.

The square root of 64987211 is about 8061.4645691710. The cubic root of 64987211 is about 402.0462043540.

The spelling of 64987211 in words is "sixty-four million, nine hundred eighty-seven thousand, two hundred eleven".