641343673 has 2 divisors, whose sum is σ = 641343674. Its totient is φ = 641343672.

The previous prime is 641343641. The next prime is 641343721. The reversal of 641343673 is 376343146.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 639735849 + 1607824 = 25293^2 + 1268^2 .

It is a cyclic number.

It is not a de Polignac number, because 641343673 - 2⁵ = 641343641 is a prime.

It is a super-2 number, since 2×641343673² = 822643413794261858, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (641343973) 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 as a sum of consecutive naturals, namely, 320671836 + 320671837.

It is an arithmetic number, because the mean of its divisors is an integer number (320671837).

Almost surely, 2^641343673 is an apocalyptic number.

It is an amenable number.

641343673 is a deficient number, since it is larger than the sum of its proper divisors (1).

641343673 is an equidigital number, since it uses as much as digits as its factorization.

641343673 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108864, while the sum is 37.

The square root of 641343673 is about 25324.7640265413. The cubic root of 641343673 is about 862.3765493830.

It can be divided in two parts, 6413 and 43673, that added together give a triangular number (50086 = T₃₁₆).

The spelling of 641343673 in words is "six hundred forty-one million, three hundred forty-three thousand, six hundred seventy-three".