494190891 has 6 divisors (see below), whose sum is σ = 713831300. Its totient is φ = 329460588.

The previous prime is 494190887. The next prime is 494190911. The reversal of 494190891 is 198091494.

It is not a de Polignac number, because 494190891 - 2² = 494190887 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (494190091) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 27455041 + ... + 27455058.

Almost surely, 2^494190891 is an apocalyptic number.

494190891 is a deficient number, since it is larger than the sum of its proper divisors (219640409).

494190891 is a wasteful number, since it uses less digits than its factorization.

494190891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54910105 (or 54910102 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 45.

The square root of 494190891 is about 22230.4046521875. The cubic root of 494190891 is about 790.6147492950.

The spelling of 494190891 in words is "four hundred ninety-four million, one hundred ninety thousand, eight hundred ninety-one".