494263391 has 2 divisors, whose sum is σ = 494263392. Its totient is φ = 494263390.

The previous prime is 494263381. The next prime is 494263417. The reversal of 494263391 is 193362494.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 494263391 - 2¹⁰ = 494262367 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (494263361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 247131695 + 247131696.

It is an arithmetic number, because the mean of its divisors is an integer number (247131696).

Almost surely, 2^494263391 is an apocalyptic number.

494263391 is a deficient number, since it is larger than the sum of its proper divisors (1).

494263391 is an equidigital number, since it uses as much as digits as its factorization.

494263391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 139968, while the sum is 41.

The square root of 494263391 is about 22232.0352419656. The cubic root of 494263391 is about 790.6534096370.

The spelling of 494263391 in words is "four hundred ninety-four million, two hundred sixty-three thousand, three hundred ninety-one".