494711221 has 2 divisors, whose sum is σ = 494711222. Its totient is φ = 494711220.

The previous prime is 494711213. The next prime is 494711249. The reversal of 494711221 is 122117494.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 308388721 + 186322500 = 17561^2 + 13650^2 .

It is a cyclic number.

It is not a de Polignac number, because 494711221 - 2³ = 494711213 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 (494111221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 247355610 + 247355611.

It is an arithmetic number, because the mean of its divisors is an integer number (247355611).

Almost surely, 2^494711221 is an apocalyptic number.

It is an amenable number.

494711221 is a deficient number, since it is larger than the sum of its proper divisors (1).

494711221 is an equidigital number, since it uses as much as digits as its factorization.

494711221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4032, while the sum is 31.

The square root of 494711221 is about 22242.1046890801. The cubic root of 494711221 is about 790.8921294765.

The spelling of 494711221 in words is "four hundred ninety-four million, seven hundred eleven thousand, two hundred twenty-one".