494871901 has 2 divisors, whose sum is σ = 494871902. Its totient is φ = 494871900.

The previous prime is 494871899. The next prime is 494871913. The reversal of 494871901 is 109178494.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 343212676 + 151659225 = 18526^2 + 12315^2 .

It is a cyclic number.

It is not a de Polignac number, because 494871901 - 2¹ = 494871899 is a prime.

Together with 494871899, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (494881901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 247435950 + 247435951.

It is an arithmetic number, because the mean of its divisors is an integer number (247435951).

Almost surely, 2^494871901 is an apocalyptic number.

It is an amenable number.

494871901 is a deficient number, since it is larger than the sum of its proper divisors (1).

494871901 is an equidigital number, since it uses as much as digits as its factorization.

494871901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72576, while the sum is 43.

The square root of 494871901 is about 22245.7164640746. The cubic root of 494871901 is about 790.9777462876.

The spelling of 494871901 in words is "four hundred ninety-four million, eight hundred seventy-one thousand, nine hundred one".