494305309 has 2 divisors, whose sum is σ = 494305310. Its totient is φ = 494305308.

The previous prime is 494305283. The next prime is 494305321. The reversal of 494305309 is 903503494.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 281232900 + 213072409 = 16770^2 + 14597^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-494305309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (494305709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 247152654 + 247152655.

It is an arithmetic number, because the mean of its divisors is an integer number (247152655).

Almost surely, 2^494305309 is an apocalyptic number.

It is an amenable number.

494305309 is a deficient number, since it is larger than the sum of its proper divisors (1).

494305309 is an equidigital number, since it uses as much as digits as its factorization.

494305309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 58320, while the sum is 37.

The square root of 494305309 is about 22232.9779606781. The cubic root of 494305309 is about 790.6757605221.

The spelling of 494305309 in words is "four hundred ninety-four million, three hundred five thousand, three hundred nine".