491466533 has 2 divisors, whose sum is σ = 491466534. Its totient is φ = 491466532.

The previous prime is 491466527. The next prime is 491466551. The reversal of 491466533 is 335664194.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 345104929 + 146361604 = 18577^2 + 12098^2 .

It is a cyclic number.

It is not a de Polignac number, because 491466533 - 2¹⁰ = 491465509 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (491466433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 245733266 + 245733267.

It is an arithmetic number, because the mean of its divisors is an integer number (245733267).

Almost surely, 2^491466533 is an apocalyptic number.

It is an amenable number.

491466533 is a deficient number, since it is larger than the sum of its proper divisors (1).

491466533 is an equidigital number, since it uses as much as digits as its factorization.

491466533 is an evil number, because the sum of its binary digits is even.

The product of its digits is 233280, while the sum is 41.

The square root of 491466533 is about 22169.0444764767. The cubic root of 491466533 is about 789.1592470882.

The spelling of 491466533 in words is "four hundred ninety-one million, four hundred sixty-six thousand, five hundred thirty-three".