247242971 has 2 divisors, whose sum is σ = 247242972. Its totient is φ = 247242970.

The previous prime is 247242937. The next prime is 247243033. The reversal of 247242971 is 179242742.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 247242971 - 2¹⁰ = 247241947 is a prime.

It is a super-2 number, since 2×247242971² = 122258173417813682, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (247242911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 123621485 + 123621486.

It is an arithmetic number, because the mean of its divisors is an integer number (123621486).

Almost surely, 2^247242971 is an apocalyptic number.

247242971 is a deficient number, since it is larger than the sum of its proper divisors (1).

247242971 is an equidigital number, since it uses as much as digits as its factorization.

247242971 is an evil number, because the sum of its binary digits is even.

The product of its digits is 56448, while the sum is 38.

The square root of 247242971 is about 15723.9616827312. The cubic root of 247242971 is about 627.6362003364.

The spelling of 247242971 in words is "two hundred forty-seven million, two hundred forty-two thousand, nine hundred seventy-one".