64947711 has 4 divisors (see below), whose sum is σ = 86596952. Its totient is φ = 43298472.

The previous prime is 64947689. The next prime is 64947713. The reversal of 64947711 is 11774946.

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

It is not a de Polignac number, because 64947711 - 2⁹ = 64947199 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 64947711.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64947713) 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, 10824616 + ... + 10824621.

It is an arithmetic number, because the mean of its divisors is an integer number (21649238).

Almost surely, 2^64947711 is an apocalyptic number.

64947711 is a deficient number, since it is larger than the sum of its proper divisors (21649241).

64947711 is a wasteful number, since it uses less digits than its factorization.

64947711 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21649240.

The product of its digits is 42336, while the sum is 39.

The square root of 64947711 is about 8059.0142697479. The cubic root of 64947711 is about 401.9647316897.

The spelling of 64947711 in words is "sixty-four million, nine hundred forty-seven thousand, seven hundred eleven".