494287191 has 40 divisors (see below), whose sum is σ = 755591760. Its totient is φ = 321919488.

The previous prime is 494287187. The next prime is 494287201. The reversal of 494287191 is 191782494.

It is a happy number.

494287191 is a `hidden beast` number, since 494 + 2 + 8 + 71 + 91 = 666.

It is not a de Polignac number, because 494287191 - 2² = 494287187 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (494287141) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1400071 + ... + 1400423.

It is an arithmetic number, because the mean of its divisors is an integer number (18889794).

Almost surely, 2^494287191 is an apocalyptic number.

494287191 is a deficient number, since it is larger than the sum of its proper divisors (261304569).

494287191 is a wasteful number, since it uses less digits than its factorization.

494287191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 717 (or 708 counting only the distinct ones).

The product of its digits is 145152, while the sum is 45.

The square root of 494287191 is about 22232.5704991573. The cubic root of 494287191 is about 790.6661000699. Note that the first 3 decimals are identical.

The spelling of 494287191 in words is "four hundred ninety-four million, two hundred eighty-seven thousand, one hundred ninety-one".