64871713 has 4 divisors (see below), whose sum is σ = 65246868. Its totient is φ = 64496560.

The previous prime is 64871689. The next prime is 64871749. The reversal of 64871713 is 31717846.

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

It can be written as a sum of positive squares in 2 ways, for example, as 45792289 + 19079424 = 6767^2 + 4368^2 .

It is a cyclic number.

It is not a de Polignac number, because 64871713 - 2¹³ = 64863521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64871783) 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, 187318 + ... + 187663.

It is an arithmetic number, because the mean of its divisors is an integer number (16311717).

Almost surely, 2^64871713 is an apocalyptic number.

It is an amenable number.

64871713 is a deficient number, since it is larger than the sum of its proper divisors (375155).

64871713 is a wasteful number, since it uses less digits than its factorization.

64871713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 375154.

The product of its digits is 28224, while the sum is 37.

The square root of 64871713 is about 8054.2977968287. The cubic root of 64871713 is about 401.8078853163.

It can be divided in two parts, 648 and 71713, that added together give a square (72361 = 269²).

The spelling of 64871713 in words is "sixty-four million, eight hundred seventy-one thousand, seven hundred thirteen".