247041000991 has 2 divisors, whose sum is σ = 247041000992. Its totient is φ = 247041000990.

The previous prime is 247041000937. The next prime is 247041001027. The reversal of 247041000991 is 199000140742.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 247041000991 - 2¹¹ = 247040998943 is a prime.

It is a super-2 number, since 2×247041000991² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 247041000991.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (247041030991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 123520500495 + 123520500496.

It is an arithmetic number, because the mean of its divisors is an integer number (123520500496).

Almost surely, 2^247041000991 is an apocalyptic number.

247041000991 is a deficient number, since it is larger than the sum of its proper divisors (1).

247041000991 is an equidigital number, since it uses as much as digits as its factorization.

247041000991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18144, while the sum is 37.

The spelling of 247041000991 in words is "two hundred forty-seven billion, forty-one million, nine hundred ninety-one", and thus it is an aban number.