641371441 has 2 divisors, whose sum is σ = 641371442. Its totient is φ = 641371440.

The previous prime is 641371439. The next prime is 641371457. The reversal of 641371441 is 144173146.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 628555041 + 12816400 = 25071^2 + 3580^2 .

It is a cyclic number.

It is not a de Polignac number, because 641371441 - 2¹ = 641371439 is a prime.

It is a super-2 number, since 2×641371441² = 822714650660832962, which contains 22 as substring.

Together with 641371439, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (641374441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320685720 + 320685721.

It is an arithmetic number, because the mean of its divisors is an integer number (320685721).

Almost surely, 2^641371441 is an apocalyptic number.

It is an amenable number.

641371441 is a deficient number, since it is larger than the sum of its proper divisors (1).

641371441 is an equidigital number, since it uses as much as digits as its factorization.

641371441 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8064, while the sum is 31.

The square root of 641371441 is about 25325.3122586870. The cubic root of 641371441 is about 862.3889951940.

The spelling of 641371441 in words is "six hundred forty-one million, three hundred seventy-one thousand, four hundred forty-one".