641701717 has 4 divisors (see below), whose sum is σ = 642694176. Its totient is φ = 640709260.

The previous prime is 641701681. The next prime is 641701721. The reversal of 641701717 is 717107146.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 641701717 - 2²⁷ = 507483989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641701787) 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, 495259 + ... + 496552.

It is an arithmetic number, because the mean of its divisors is an integer number (160673544).

Almost surely, 2^641701717 is an apocalyptic number.

It is an amenable number.

641701717 is a deficient number, since it is larger than the sum of its proper divisors (992459).

641701717 is an equidigital number, since it uses as much as digits as its factorization.

641701717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 992458.

The product of its (nonzero) digits is 8232, while the sum is 34.

The square root of 641701717 is about 25331.8320892903. The cubic root of 641701717 is about 862.5369996590.

The spelling of 641701717 in words is "six hundred forty-one million, seven hundred one thousand, seven hundred seventeen".