494487871 has 2 divisors, whose sum is σ = 494487872. Its totient is φ = 494487870.

The previous prime is 494487817. The next prime is 494487883. The reversal of 494487871 is 178784494.

It is a happy number.

Together with previous prime (494487817) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 494487871 - 2²⁷ = 360270143 is a prime.

It is a super-3 number, since 3×494487871³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (494487571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 247243935 + 247243936.

It is an arithmetic number, because the mean of its divisors is an integer number (247243936).

Almost surely, 2^494487871 is an apocalyptic number.

494487871 is a deficient number, since it is larger than the sum of its proper divisors (1).

494487871 is an equidigital number, since it uses as much as digits as its factorization.

494487871 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1806336, while the sum is 52.

The square root of 494487871 is about 22237.0832394898. The cubic root of 494487871 is about 790.7730887513.

The spelling of 494487871 in words is "four hundred ninety-four million, four hundred eighty-seven thousand, eight hundred seventy-one".