119891987 has 2 divisors, whose sum is σ = 119891988. Its totient is φ = 119891986.

The previous prime is 119891977. The next prime is 119892013. The reversal of 119891987 is 789198911.

It is a weak prime.

It is an emirp because it is prime and its reverse (789198911) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 119891987 - 2⁸ = 119891731 is a prime.

It is not a weakly prime, because it can be changed into another prime (119891917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 59945993 + 59945994.

It is an arithmetic number, because the mean of its divisors is an integer number (59945994).

Almost surely, 2^119891987 is an apocalyptic number.

119891987 is a deficient number, since it is larger than the sum of its proper divisors (1).

119891987 is an equidigital number, since it uses as much as digits as its factorization.

119891987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 326592, while the sum is 53.

The square root of 119891987 is about 10949.5199438149. The cubic root of 119891987 is about 493.0943799054.

The spelling of 119891987 in words is "one hundred nineteen million, eight hundred ninety-one thousand, nine hundred eighty-seven".