491087441 has 4 divisors (see below), whose sum is σ = 528863412. Its totient is φ = 453311472.

The previous prime is 491087437. The next prime is 491087473. The reversal of 491087441 is 144780194.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 197993041 + 293094400 = 14071^2 + 17120^2 .

It is a cyclic number.

It is not a de Polignac number, because 491087441 - 2² = 491087437 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 491087395 and 491087404.

It is not an unprimeable number, because it can be changed into a prime (491087411) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18887966 + ... + 18887991.

It is an arithmetic number, because the mean of its divisors is an integer number (132215853).

Almost surely, 2^491087441 is an apocalyptic number.

It is an amenable number.

491087441 is a deficient number, since it is larger than the sum of its proper divisors (37775971).

491087441 is a wasteful number, since it uses less digits than its factorization.

491087441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37775970.

The product of its (nonzero) digits is 32256, while the sum is 38.

The square root of 491087441 is about 22160.4927968671. The cubic root of 491087441 is about 788.9562892805.

The spelling of 491087441 in words is "four hundred ninety-one million, eighty-seven thousand, four hundred forty-one".