641682127 has 4 divisors (see below), whose sum is σ = 642558280. Its totient is φ = 640805976.

The previous prime is 641682109. The next prime is 641682131. The reversal of 641682127 is 721286146.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-641682127 is a prime.

It is a super-2 number, since 2×641682127² = 823511904222488258, 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 (641682137) 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, 436977 + ... + 438442.

It is an arithmetic number, because the mean of its divisors is an integer number (160639570).

Almost surely, 2^641682127 is an apocalyptic number.

641682127 is a deficient number, since it is larger than the sum of its proper divisors (876153).

641682127 is an equidigital number, since it uses as much as digits as its factorization.

641682127 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 876152.

The product of its digits is 32256, while the sum is 37.

The square root of 641682127 is about 25331.4454186886. The cubic root of 641682127 is about 862.5282223349.

The spelling of 641682127 in words is "six hundred forty-one million, six hundred eighty-two thousand, one hundred twenty-seven".