494716021 has 2 divisors, whose sum is σ = 494716022. Its totient is φ = 494716020.

The previous prime is 494715973. The next prime is 494716043. The reversal of 494716021 is 120617494.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 441630225 + 53085796 = 21015^2 + 7286^2 .

It is a cyclic number.

It is not a de Polignac number, because 494716021 - 2⁹ = 494715509 is a prime.

It is equal to p_26091925 and since 494716021 and 26091925 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (494716051) 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, 247358010 + 247358011.

It is an arithmetic number, because the mean of its divisors is an integer number (247358011).

Almost surely, 2^494716021 is an apocalyptic number.

It is an amenable number.

494716021 is a deficient number, since it is larger than the sum of its proper divisors (1).

494716021 is an equidigital number, since it uses as much as digits as its factorization.

494716021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 494716021 is about 22242.2125922760. The cubic root of 494716021 is about 790.8946873795.

The spelling of 494716021 in words is "four hundred ninety-four million, seven hundred sixteen thousand, twenty-one".