247855147 has 2 divisors, whose sum is σ = 247855148. Its totient is φ = 247855146.

The previous prime is 247855129. The next prime is 247855163. The reversal of 247855147 is 741558742.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 247855147 - 2¹⁹ = 247330859 is a prime.

It is a super-2 number, since 2×247855147² = 122864347788783218, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (247852147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 123927573 + 123927574.

It is an arithmetic number, because the mean of its divisors is an integer number (123927574).

Almost surely, 2^247855147 is an apocalyptic number.

247855147 is a deficient number, since it is larger than the sum of its proper divisors (1).

247855147 is an equidigital number, since it uses as much as digits as its factorization.

247855147 is an evil number, because the sum of its binary digits is even.

The product of its digits is 313600, while the sum is 43.

The square root of 247855147 is about 15743.4159889142. The cubic root of 247855147 is about 628.1537845014.

The spelling of 247855147 in words is "two hundred forty-seven million, eight hundred fifty-five thousand, one hundred forty-seven".