189848987 has 2 divisors, whose sum is σ = 189848988. Its totient is φ = 189848986.

The previous prime is 189848977. The next prime is 189849029. The reversal of 189848987 is 789848981.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 189848987 - 2¹⁴ = 189832603 is a prime.

It is not a weakly prime, because it can be changed into another prime (189848957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94924493 + 94924494.

It is an arithmetic number, because the mean of its divisors is an integer number (94924494).

Almost surely, 2^189848987 is an apocalyptic number.

189848987 is a deficient number, since it is larger than the sum of its proper divisors (1).

189848987 is an equidigital number, since it uses as much as digits as its factorization.

189848987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9289728, while the sum is 62.

The square root of 189848987 is about 13778.5698459601. The cubic root of 189848987 is about 574.7373590696.

The spelling of 189848987 in words is "one hundred eighty-nine million, eight hundred forty-eight thousand, nine hundred eighty-seven".