111995019289 has 2 divisors, whose sum is σ = 111995019290. Its totient is φ = 111995019288.

The previous prime is 111995019271. The next prime is 111995019337. The reversal of 111995019289 is 982910599111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 78956504064 + 33038515225 = 280992^2 + 181765^2 .

It is a cyclic number.

It is not a de Polignac number, because 111995019289 - 2¹⁹ = 111994495001 is a prime.

It is not a weakly prime, because it can be changed into another prime (111995019259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55997509644 + 55997509645.

It is an arithmetic number, because the mean of its divisors is an integer number (55997509645).

Almost surely, 2^111995019289 is an apocalyptic number.

It is an amenable number.

111995019289 is a deficient number, since it is larger than the sum of its proper divisors (1).

111995019289 is an equidigital number, since it uses as much as digits as its factorization.

111995019289 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 524880, while the sum is 55.

The spelling of 111995019289 in words is "one hundred eleven billion, nine hundred ninety-five million, nineteen thousand, two hundred eighty-nine".