119969987 has 2 divisors, whose sum is σ = 119969988. Its totient is φ = 119969986.

The previous prime is 119969959. The next prime is 119969989. The reversal of 119969987 is 789969911.

It is a strong prime.

It is an emirp because it is prime and its reverse (789969911) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 119969987 - 2¹⁰ = 119968963 is a prime.

Together with 119969989, 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 (119969989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 59984993 + 59984994.

It is an arithmetic number, because the mean of its divisors is an integer number (59984994).

Almost surely, 2^119969987 is an apocalyptic number.

119969987 is a deficient number, since it is larger than the sum of its proper divisors (1).

119969987 is an equidigital number, since it uses as much as digits as its factorization.

119969987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2204496, while the sum is 59.

The square root of 119969987 is about 10953.0811646769. The cubic root of 119969987 is about 493.2012900912.

The spelling of 119969987 in words is "one hundred nineteen million, nine hundred sixty-nine thousand, nine hundred eighty-seven".