494897261 has 2 divisors, whose sum is σ = 494897262. Its totient is φ = 494897260.

The previous prime is 494897257. The next prime is 494897269. The reversal of 494897261 is 162798494.

494897261 = 15730² + 15731².

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 247464361 + 247432900 = 15731^2 + 15730^2 .

It is a cyclic number.

It is not a de Polignac number, because 494897261 - 2² = 494897257 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (494897269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 247448630 + 247448631.

It is an arithmetic number, because the mean of its divisors is an integer number (247448631).

Almost surely, 2^494897261 is an apocalyptic number.

494897261 is the 15731-st centered square number.

It is an amenable number.

494897261 is a deficient number, since it is larger than the sum of its proper divisors (1).

494897261 is an equidigital number, since it uses as much as digits as its factorization.

494897261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 870912, while the sum is 50.

The square root of 494897261 is about 22246.2864541478. The cubic root of 494897261 is about 790.9912574292.

The spelling of 494897261 in words is "four hundred ninety-four million, eight hundred ninety-seven thousand, two hundred sixty-one".