641334091 has 8 divisors (see below), whose sum is σ = 650525040. Its totient is φ = 632203488.

The previous prime is 641334077. The next prime is 641334119. The reversal of 641334091 is 190433146.

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

It is not a de Polignac number, because 641334091 - 2⁵ = 641334059 is a prime.

It is a super-2 number, since 2×641334091² = 822618832557592562, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (641334191) 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, 6540 + ... + 36406.

It is an arithmetic number, because the mean of its divisors is an integer number (81315630).

Almost surely, 2^641334091 is an apocalyptic number.

641334091 is a deficient number, since it is larger than the sum of its proper divisors (9190949).

641334091 is a wasteful number, since it uses less digits than its factorization.

641334091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30173.

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 641334091 is about 25324.5748434204. The cubic root of 641334091 is about 862.3722545804.

It can be divided in two parts, 6413 and 34091, that added together give a palindrome (40504).

The spelling of 641334091 in words is "six hundred forty-one million, three hundred thirty-four thousand, ninety-one".