641133613 has 2 divisors, whose sum is σ = 641133614. Its totient is φ = 641133612.

The previous prime is 641133611. The next prime is 641133643. The reversal of 641133613 is 316331146.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 571544649 + 69588964 = 23907^2 + 8342^2 .

It is a cyclic number.

It is not a de Polignac number, because 641133613 - 2¹ = 641133611 is a prime.

It is a super-2 number, since 2×641133613² = 822104619436867538, which contains 22 as substring.

Together with 641133611, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (641133611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320566806 + 320566807.

It is an arithmetic number, because the mean of its divisors is an integer number (320566807).

Almost surely, 2^641133613 is an apocalyptic number.

It is an amenable number.

641133613 is a deficient number, since it is larger than the sum of its proper divisors (1).

641133613 is an equidigital number, since it uses as much as digits as its factorization.

641133613 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3888, while the sum is 28.

The square root of 641133613 is about 25320.6163629561. The cubic root of 641133613 is about 862.2823873880.

Adding to 641133613 its reverse (316331146), we get a palindrome (957464759).

The spelling of 641133613 in words is "six hundred forty-one million, one hundred thirty-three thousand, six hundred thirteen".