491641463 has 2 divisors, whose sum is σ = 491641464. Its totient is φ = 491641462.

The previous prime is 491641441. The next prime is 491641477. The reversal of 491641463 is 364146194.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 491641463 - 2²² = 487447159 is a prime.

It is a super-2 number, since 2×491641463² = 483422656281560738, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (491641433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 245820731 + 245820732.

It is an arithmetic number, because the mean of its divisors is an integer number (245820732).

Almost surely, 2^491641463 is an apocalyptic number.

491641463 is a deficient number, since it is larger than the sum of its proper divisors (1).

491641463 is an equidigital number, since it uses as much as digits as its factorization.

491641463 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 62208, while the sum is 38.

The square root of 491641463 is about 22172.9894917217. The cubic root of 491641463 is about 789.2528657054.

The spelling of 491641463 in words is "four hundred ninety-one million, six hundred forty-one thousand, four hundred sixty-three".