911990116187 has 2 divisors, whose sum is σ = 911990116188. Its totient is φ = 911990116186.

The previous prime is 911990116159. The next prime is 911990116291. The reversal of 911990116187 is 781611099119.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 911990116187 - 2¹⁸ = 911989854043 is a prime.

It is not a weakly prime, because it can be changed into another prime (911990116087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 455995058093 + 455995058094.

It is an arithmetic number, because the mean of its divisors is an integer number (455995058094).

Almost surely, 2^911990116187 is an apocalyptic number.

911990116187 is a deficient number, since it is larger than the sum of its proper divisors (1).

911990116187 is an equidigital number, since it uses as much as digits as its factorization.

911990116187 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 244944, while the sum is 53.

The spelling of 911990116187 in words is "nine hundred eleven billion, nine hundred ninety million, one hundred sixteen thousand, one hundred eighty-seven".