247860449 has 2 divisors, whose sum is σ = 247860450. Its totient is φ = 247860448.

The previous prime is 247860433. The next prime is 247860451. The reversal of 247860449 is 944068742.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 200732224 + 47128225 = 14168^2 + 6865^2 .

It is a cyclic number.

It is not a de Polignac number, because 247860449 - 2⁴ = 247860433 is a prime.

It is a super-2 number, since 2×247860449² = 122869604356963202, which contains 22 as substring.

Together with 247860451, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (247860479) 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, 123930224 + 123930225.

It is an arithmetic number, because the mean of its divisors is an integer number (123930225).

Almost surely, 2^247860449 is an apocalyptic number.

It is an amenable number.

247860449 is a deficient number, since it is larger than the sum of its proper divisors (1).

247860449 is an equidigital number, since it uses as much as digits as its factorization.

247860449 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 387072, while the sum is 44.

The square root of 247860449 is about 15743.5843758656. The cubic root of 247860449 is about 628.1582635256.

The spelling of 247860449 in words is "two hundred forty-seven million, eight hundred sixty thousand, four hundred forty-nine".