494728891 has 2 divisors, whose sum is σ = 494728892. Its totient is φ = 494728890.

The previous prime is 494728877. The next prime is 494728901. The reversal of 494728891 is 198827494.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 494728891 - 2⁹ = 494728379 is a prime.

It is not a weakly prime, because it can be changed into another prime (494728831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 247364445 + 247364446.

It is an arithmetic number, because the mean of its divisors is an integer number (247364446).

Almost surely, 2^494728891 is an apocalyptic number.

494728891 is a deficient number, since it is larger than the sum of its proper divisors (1).

494728891 is an equidigital number, since it uses as much as digits as its factorization.

494728891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1161216, while the sum is 52.

The square root of 494728891 is about 22242.5019051365. The cubic root of 494728891 is about 790.9015456752.

The spelling of 494728891 in words is "four hundred ninety-four million, seven hundred twenty-eight thousand, eight hundred ninety-one".