641270479 has 4 divisors (see below), whose sum is σ = 653369976. Its totient is φ = 629170984.

The previous prime is 641270473. The next prime is 641270507. The reversal of 641270479 is 974072146.

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

It is a cyclic number.

It is not a de Polignac number, because 641270479 - 2¹⁷ = 641139407 is a prime.

It is a super-2 number, since 2×641270479² = 822455654473778882, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641270473) 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, 6049669 + ... + 6049774.

It is an arithmetic number, because the mean of its divisors is an integer number (163342494).

Almost surely, 2^641270479 is an apocalyptic number.

641270479 is a deficient number, since it is larger than the sum of its proper divisors (12099497).

641270479 is a wasteful number, since it uses less digits than its factorization.

641270479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12099496.

The product of its (nonzero) digits is 84672, while the sum is 40.

The square root of 641270479 is about 25323.3188780618. The cubic root of 641270479 is about 862.3437416008.

The spelling of 641270479 in words is "six hundred forty-one million, two hundred seventy thousand, four hundred seventy-nine".