494406161 has 2 divisors, whose sum is σ = 494406162. Its totient is φ = 494406160.

The previous prime is 494406139. The next prime is 494406169. The reversal of 494406161 is 161604494.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 443355136 + 51051025 = 21056^2 + 7145^2 .

It is a cyclic number.

It is not a de Polignac number, because 494406161 - 2⁶ = 494406097 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (494406169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 247203080 + 247203081.

It is an arithmetic number, because the mean of its divisors is an integer number (247203081).

Almost surely, 2^494406161 is an apocalyptic number.

It is an amenable number.

494406161 is a deficient number, since it is larger than the sum of its proper divisors (1).

494406161 is an equidigital number, since it uses as much as digits as its factorization.

494406161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 494406161 is about 22235.2459172369. The cubic root of 494406161 is about 790.7295301309.

The spelling of 494406161 in words is "four hundred ninety-four million, four hundred six thousand, one hundred sixty-one".