247845449 has 2 divisors, whose sum is σ = 247845450. Its totient is φ = 247845448.

The previous prime is 247845427. The next prime is 247845461. The reversal of 247845449 is 944548742.

247845449 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 126405049 + 121440400 = 11243^2 + 11020^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-247845449 is a prime.

It is a super-2 number, since 2×247845449² = 122854733180023202, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (247845149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 123922724 + 123922725.

It is an arithmetic number, because the mean of its divisors is an integer number (123922725).

Almost surely, 2^247845449 is an apocalyptic number.

It is an amenable number.

247845449 is a deficient number, since it is larger than the sum of its proper divisors (1).

247845449 is an equidigital number, since it uses as much as digits as its factorization.

247845449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1290240, while the sum is 47.

The square root of 247845449 is about 15743.1079841307. The cubic root of 247845449 is about 628.1455916585.

The spelling of 247845449 in words is "two hundred forty-seven million, eight hundred forty-five thousand, four hundred forty-nine".