247442113 has 2 divisors, whose sum is σ = 247442114. Its totient is φ = 247442112.

The previous prime is 247442087. The next prime is 247442131. The reversal of 247442113 is 311244742.

Together with next prime (247442131) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 198049329 + 49392784 = 14073^2 + 7028^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-247442113 is a prime.

It is a super-2 number, since 2×247442113² = 122455198571809538, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (247442513) 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, 123721056 + 123721057.

It is an arithmetic number, because the mean of its divisors is an integer number (123721057).

Almost surely, 2^247442113 is an apocalyptic number.

It is an amenable number.

247442113 is a deficient number, since it is larger than the sum of its proper divisors (1).

247442113 is an equidigital number, since it uses as much as digits as its factorization.

247442113 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5376, while the sum is 28.

The square root of 247442113 is about 15730.2928453351. The cubic root of 247442113 is about 627.8046650997.

Adding to 247442113 its reverse (311244742), we get a palindrome (558686855).

The spelling of 247442113 in words is "two hundred forty-seven million, four hundred forty-two thousand, one hundred thirteen".