641765473 has 2 divisors, whose sum is σ = 641765474. Its totient is φ = 641765472.

The previous prime is 641765459. The next prime is 641765477. The reversal of 641765473 is 374567146.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 631416384 + 10349089 = 25128^2 + 3217^2 .

It is a cyclic number.

It is not a de Polignac number, because 641765473 - 2⁹ = 641764961 is a prime.

It is not a weakly prime, because it can be changed into another prime (641765477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320882736 + 320882737.

It is an arithmetic number, because the mean of its divisors is an integer number (320882737).

Almost surely, 2^641765473 is an apocalyptic number.

It is an amenable number.

641765473 is a deficient number, since it is larger than the sum of its proper divisors (1).

641765473 is an equidigital number, since it uses as much as digits as its factorization.

641765473 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 423360, while the sum is 43.

The square root of 641765473 is about 25333.0904747131. The cubic root of 641765473 is about 862.5655643781.

The spelling of 641765473 in words is "six hundred forty-one million, seven hundred sixty-five thousand, four hundred seventy-three".