491641441 has 2 divisors, whose sum is σ = 491641442. Its totient is φ = 491641440.

The previous prime is 491641433. The next prime is 491641463. The reversal of 491641441 is 144146194.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 358723600 + 132917841 = 18940^2 + 11529^2 .

It is a cyclic number.

It is not a de Polignac number, because 491641441 - 2³ = 491641433 is a prime.

It is a super-2 number, since 2×491641441² = 483422613017112962, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 491641397 and 491641406.

It is not a weakly prime, because it can be changed into another prime (491641421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 245820720 + 245820721.

It is an arithmetic number, because the mean of its divisors is an integer number (245820721).

Almost surely, 2^491641441 is an apocalyptic number.

It is an amenable number.

491641441 is a deficient number, since it is larger than the sum of its proper divisors (1).

491641441 is an equidigital number, since it uses as much as digits as its factorization.

491641441 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13824, while the sum is 34.

The square root of 491641441 is about 22172.9889956226. The cubic root of 491641441 is about 789.2528539329.

It can be divided in two parts, 49164 and 1441, that added together give a palindrome (50605).

The spelling of 491641441 in words is "four hundred ninety-one million, six hundred forty-one thousand, four hundred forty-one".