247243147 has 2 divisors, whose sum is σ = 247243148. Its totient is φ = 247243146.

The previous prime is 247243141. The next prime is 247243151. The reversal of 247243147 is 741342742.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-247243147 is a prime.

It is a super-2 number, since 2×247243147² = 122258347476927218, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (247243141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 123621573 + 123621574.

It is an arithmetic number, because the mean of its divisors is an integer number (123621574).

Almost surely, 2^247243147 is an apocalyptic number.

247243147 is a deficient number, since it is larger than the sum of its proper divisors (1).

247243147 is an equidigital number, since it uses as much as digits as its factorization.

247243147 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 37632, while the sum is 34.

The square root of 247243147 is about 15723.9672792842. The cubic root of 247243147 is about 627.6363492640.

Adding to 247243147 its reverse (741342742), we get a palindrome (988585889).

The spelling of 247243147 in words is "two hundred forty-seven million, two hundred forty-three thousand, one hundred forty-seven".