245647673 has 2 divisors, whose sum is σ = 245647674. Its totient is φ = 245647672.

The previous prime is 245647667. The next prime is 245647681. The reversal of 245647673 is 376746542.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 234304249 + 11343424 = 15307^2 + 3368^2 .

It is a cyclic number.

It is not a de Polignac number, because 245647673 - 2¹² = 245643577 is a prime.

It is not a weakly prime, because it can be changed into another prime (245647873) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122823836 + 122823837.

It is an arithmetic number, because the mean of its divisors is an integer number (122823837).

Almost surely, 2^245647673 is an apocalyptic number.

It is an amenable number.

245647673 is a deficient number, since it is larger than the sum of its proper divisors (1).

245647673 is an equidigital number, since it uses as much as digits as its factorization.

245647673 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 846720, while the sum is 44.

The square root of 245647673 is about 15673.1513423434. The cubic root of 245647673 is about 626.2833771983.

The spelling of 245647673 in words is "two hundred forty-five million, six hundred forty-seven thousand, six hundred seventy-three".