494638091 has 2 divisors, whose sum is σ = 494638092. Its totient is φ = 494638090.

The previous prime is 494638061. The next prime is 494638097. The reversal of 494638091 is 190836494.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 494638091 - 2¹⁰ = 494637067 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (494638097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 247319045 + 247319046.

It is an arithmetic number, because the mean of its divisors is an integer number (247319046).

Almost surely, 2^494638091 is an apocalyptic number.

494638091 is a deficient number, since it is larger than the sum of its proper divisors (1).

494638091 is an equidigital number, since it uses as much as digits as its factorization.

494638091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 186624, while the sum is 44.

The square root of 494638091 is about 22240.4606741857. The cubic root of 494638091 is about 790.8531567121.

The spelling of 494638091 in words is "four hundred ninety-four million, six hundred thirty-eight thousand, ninety-one".