491553443 has 2 divisors, whose sum is σ = 491553444. Its totient is φ = 491553442.

The previous prime is 491553431. The next prime is 491553467. The reversal of 491553443 is 344355194.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 491553443 - 2⁶ = 491553379 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 491553397 and 491553406.

It is not a weakly prime, because it can be changed into another prime (491553743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 245776721 + 245776722.

It is an arithmetic number, because the mean of its divisors is an integer number (245776722).

Almost surely, 2^491553443 is an apocalyptic number.

491553443 is a deficient number, since it is larger than the sum of its proper divisors (1).

491553443 is an equidigital number, since it uses as much as digits as its factorization.

491553443 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 129600, while the sum is 38.

The square root of 491553443 is about 22171.0045555000. The cubic root of 491553443 is about 789.2057621494.

The spelling of 491553443 in words is "four hundred ninety-one million, five hundred fifty-three thousand, four hundred forty-three".