641676923 has 2 divisors, whose sum is σ = 641676924. Its totient is φ = 641676922.

The previous prime is 641676863. The next prime is 641676961. The reversal of 641676923 is 329676146.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 641676923 - 2⁶ = 641676859 is a prime.

It is not a weakly prime, because it can be changed into another prime (641676523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320838461 + 320838462.

It is an arithmetic number, because the mean of its divisors is an integer number (320838462).

Almost surely, 2^641676923 is an apocalyptic number.

641676923 is a deficient number, since it is larger than the sum of its proper divisors (1).

641676923 is an equidigital number, since it uses as much as digits as its factorization.

641676923 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 326592, while the sum is 44.

The square root of 641676923 is about 25331.3427002992. The cubic root of 641676923 is about 862.5258906462.

The spelling of 641676923 in words is "six hundred forty-one million, six hundred seventy-six thousand, nine hundred twenty-three".