189860489 has 16 divisors (see below), whose sum is σ = 234592512. Its totient is φ = 149629248.

The previous prime is 189860459. The next prime is 189860501. The reversal of 189860489 is 984068981.

It is a cyclic number.

It is not a de Polignac number, because 189860489 - 2¹² = 189856393 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 189860489.

It is not an unprimeable number, because it can be changed into a prime (189860459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19967 + ... + 27899.

It is an arithmetic number, because the mean of its divisors is an integer number (14662032).

Almost surely, 2^189860489 is an apocalyptic number.

It is an amenable number.

189860489 is a deficient number, since it is larger than the sum of its proper divisors (44732023).

189860489 is a wasteful number, since it uses less digits than its factorization.

189860489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8216.

The product of its (nonzero) digits is 995328, while the sum is 53.

The square root of 189860489 is about 13778.9872269336. The cubic root of 189860489 is about 574.7489656553.

The spelling of 189860489 in words is "one hundred eighty-nine million, eight hundred sixty thousand, four hundred eighty-nine".