641583101 has 2 divisors, whose sum is σ = 641583102. Its totient is φ = 641583100.

The previous prime is 641583079. The next prime is 641583143. The reversal of 641583101 is 101385146.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 337603876 + 303979225 = 18374^2 + 17435^2 .

It is a cyclic number.

It is not a de Polignac number, because 641583101 - 2¹⁰ = 641582077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (641583181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320791550 + 320791551.

It is an arithmetic number, because the mean of its divisors is an integer number (320791551).

Almost surely, 2^641583101 is an apocalyptic number.

It is an amenable number.

641583101 is a deficient number, since it is larger than the sum of its proper divisors (1).

641583101 is an equidigital number, since it uses as much as digits as its factorization.

641583101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 641583101 is about 25329.4907370835. The cubic root of 641583101 is about 862.4838508774.

The spelling of 641583101 in words is "six hundred forty-one million, five hundred eighty-three thousand, one hundred one".