641385727 has 8 divisors (see below), whose sum is σ = 646272000. Its totient is φ = 636518520.

The previous prime is 641385697. The next prime is 641385733. The reversal of 641385727 is 727583146.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 641385727 - 2¹⁹ = 640861439 is a prime.

It is a super-2 number, since 2×641385727² = 822751301598637058, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641355727) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66774 + ... + 75772.

It is an arithmetic number, because the mean of its divisors is an integer number (80784000).

Almost surely, 2^641385727 is an apocalyptic number.

641385727 is a deficient number, since it is larger than the sum of its proper divisors (4886273).

641385727 is a wasteful number, since it uses less digits than its factorization.

641385727 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9533.

The product of its digits is 282240, while the sum is 43.

The square root of 641385727 is about 25325.5943069457. The cubic root of 641385727 is about 862.3953981387.

The spelling of 641385727 in words is "six hundred forty-one million, three hundred eighty-five thousand, seven hundred twenty-seven".