494974391 has 2 divisors, whose sum is σ = 494974392. Its totient is φ = 494974390.

The previous prime is 494974373. The next prime is 494974393. The reversal of 494974391 is 193479494.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 494974391 - 2¹⁴ = 494958007 is a prime.

Together with 494974393, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (494974393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 247487195 + 247487196.

It is an arithmetic number, because the mean of its divisors is an integer number (247487196).

Almost surely, 2^494974391 is an apocalyptic number.

494974391 is a deficient number, since it is larger than the sum of its proper divisors (1).

494974391 is an equidigital number, since it uses as much as digits as its factorization.

494974391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 979776, while the sum is 50.

The square root of 494974391 is about 22248.0199343672. The cubic root of 494974391 is about 791.0323474300.

The spelling of 494974391 in words is "four hundred ninety-four million, nine hundred seventy-four thousand, three hundred ninety-one".