641352713 has 4 divisors (see below), whose sum is σ = 641569428. Its totient is φ = 641136000.

The previous prime is 641352671. The next prime is 641352721. The reversal of 641352713 is 317253146.

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 445716544 + 195636169 = 21112^2 + 13987^2 .

It is a cyclic number.

It is not a de Polignac number, because 641352713 - 2¹⁶ = 641287177 is a prime.

It is a super-2 number, since 2×641352713² = 822666604944920738, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 641352713.

It is not an unprimeable number, because it can be changed into a prime (641352773) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 103856 + ... + 109857.

It is an arithmetic number, because the mean of its divisors is an integer number (160392357).

Almost surely, 2^641352713 is an apocalyptic number.

It is an amenable number.

641352713 is a deficient number, since it is larger than the sum of its proper divisors (216715).

641352713 is a wasteful number, since it uses less digits than its factorization.

641352713 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216714.

The product of its digits is 15120, while the sum is 32.

The square root of 641352713 is about 25324.9425073385. The cubic root of 641352713 is about 862.3806012134.

The spelling of 641352713 in words is "six hundred forty-one million, three hundred fifty-two thousand, seven hundred thirteen".