247240043 has 2 divisors, whose sum is σ = 247240044. Its totient is φ = 247240042.

The previous prime is 247239997. The next prime is 247240111. The reversal of 247240043 is 340042742.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 247240043 - 2¹⁰ = 247239019 is a prime.

It is a super-2 number, since 2×247240043² = 122255277725283698, which contains 22 as substring.

It is a Sophie Germain prime.

It is equal to p_13536413 and since 247240043 and 13536413 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 247239994 and 247240021.

It is not a weakly prime, because it can be changed into another prime (247240943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 123620021 + 123620022.

It is an arithmetic number, because the mean of its divisors is an integer number (123620022).

Almost surely, 2^247240043 is an apocalyptic number.

247240043 is a deficient number, since it is larger than the sum of its proper divisors (1).

247240043 is an equidigital number, since it uses as much as digits as its factorization.

247240043 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5376, while the sum is 26.

The square root of 247240043 is about 15723.8685761488. The cubic root of 247240043 is about 627.6337227114.

Adding to 247240043 its reverse (340042742), we get a palindrome (587282785).

The spelling of 247240043 in words is "two hundred forty-seven million, two hundred forty thousand, forty-three".