191430982387 has 2 divisors, whose sum is σ = 191430982388. Its totient is φ = 191430982386.

The previous prime is 191430982333. The next prime is 191430982409. The reversal of 191430982387 is 783289034191.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (783289034191) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 191430982387 - 2³⁵ = 157071244019 is a prime.

It is not a weakly prime, because it can be changed into another prime (191430988387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95715491193 + 95715491194.

It is an arithmetic number, because the mean of its divisors is an integer number (95715491194).

Almost surely, 2^191430982387 is an apocalyptic number.

191430982387 is a deficient number, since it is larger than the sum of its proper divisors (1).

191430982387 is an equidigital number, since it uses as much as digits as its factorization.

191430982387 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2612736, while the sum is 55.

The spelling of 191430982387 in words is "one hundred ninety-one billion, four hundred thirty million, nine hundred eighty-two thousand, three hundred eighty-seven".