641180879 has 2 divisors, whose sum is σ = 641180880. Its totient is φ = 641180878.

The previous prime is 641180801. The next prime is 641180887. The reversal of 641180879 is 978081146.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 641180879 - 2²⁸ = 372745423 is a prime.

It is a super-2 number, since 2×641180879² = 822225839190425282, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (641180899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320590439 + 320590440.

It is an arithmetic number, because the mean of its divisors is an integer number (320590440).

Almost surely, 2^641180879 is an apocalyptic number.

641180879 is a deficient number, since it is larger than the sum of its proper divisors (1).

641180879 is an equidigital number, since it uses as much as digits as its factorization.

641180879 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96768, while the sum is 44.

The square root of 641180879 is about 25321.5496958618. The cubic root of 641180879 is about 862.3035767506.

The spelling of 641180879 in words is "six hundred forty-one million, one hundred eighty thousand, eight hundred seventy-nine".