494342021 has 2 divisors, whose sum is σ = 494342022. Its totient is φ = 494342020.

The previous prime is 494341957. The next prime is 494342029. The reversal of 494342021 is 120243494.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 489028996 + 5313025 = 22114^2 + 2305^2 .

It is a cyclic number.

It is not a de Polignac number, because 494342021 - 2⁶ = 494341957 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (494342029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 247171010 + 247171011.

It is an arithmetic number, because the mean of its divisors is an integer number (247171011).

Almost surely, 2^494342021 is an apocalyptic number.

It is an amenable number.

494342021 is a deficient number, since it is larger than the sum of its proper divisors (1).

494342021 is an equidigital number, since it uses as much as digits as its factorization.

494342021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 494342021 is about 22233.8035657420. The cubic root of 494342021 is about 790.6953345043.

It can be divided in two parts, 4943 and 42021, that added together give a palindrome (46964).

The spelling of 494342021 in words is "four hundred ninety-four million, three hundred forty-two thousand, twenty-one".