641630807 has 2 divisors, whose sum is σ = 641630808. Its totient is φ = 641630806.

The previous prime is 641630767. The next prime is 641630831. The reversal of 641630807 is 708036146.

641630807 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 641630807 - 2¹⁰ = 641629783 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (641632807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320815403 + 320815404.

It is an arithmetic number, because the mean of its divisors is an integer number (320815404).

Almost surely, 2^641630807 is an apocalyptic number.

641630807 is a deficient number, since it is larger than the sum of its proper divisors (1).

641630807 is an equidigital number, since it uses as much as digits as its factorization.

641630807 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 641630807 is about 25330.4324282078. The cubic root of 641630807 is about 862.5052274975.

The spelling of 641630807 in words is "six hundred forty-one million, six hundred thirty thousand, eight hundred seven".