247993378187 has 2 divisors, whose sum is σ = 247993378188. Its totient is φ = 247993378186.

The previous prime is 247993378097. The next prime is 247993378189. The reversal of 247993378187 is 781873399742.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 247993378187 - 2³⁰ = 246919636363 is a prime.

Together with 247993378189, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (247993378189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 123996689093 + 123996689094.

It is an arithmetic number, because the mean of its divisors is an integer number (123996689094).

Almost surely, 2^247993378187 is an apocalyptic number.

247993378187 is a deficient number, since it is larger than the sum of its proper divisors (1).

247993378187 is an equidigital number, since it uses as much as digits as its factorization.

247993378187 is an evil number, because the sum of its binary digits is even.

The product of its digits is 128024064, while the sum is 68.

The spelling of 247993378187 in words is "two hundred forty-seven billion, nine hundred ninety-three million, three hundred seventy-eight thousand, one hundred eighty-seven".