641478713 has 4 divisors (see below), whose sum is σ = 641554320. Its totient is φ = 641403108.

The previous prime is 641478707. The next prime is 641478727. The reversal of 641478713 is 317874146.

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 641478713 - 2⁸ = 641478457 is a prime.

It is a super-2 number, since 2×641478713² = 822989878464272738, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (641478793) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23195 + ... + 42672.

It is an arithmetic number, because the mean of its divisors is an integer number (160388580).

Almost surely, 2^641478713 is an apocalyptic number.

It is an amenable number.

641478713 is a deficient number, since it is larger than the sum of its proper divisors (75607).

641478713 is an equidigital number, since it uses as much as digits as its factorization.

641478713 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75606.

The product of its digits is 112896, while the sum is 41.

The square root of 641478713 is about 25327.4300512310. The cubic root of 641478713 is about 862.4370718774.

The spelling of 641478713 in words is "six hundred forty-one million, four hundred seventy-eight thousand, seven hundred thirteen".