154989 has 12 divisors (see below), whose sum is σ = 237276. Its totient is φ = 97152.

The previous prime is 154981. The next prime is 154991. The reversal of 154989 is 989451.

It can be written as a sum of positive squares in 2 ways, for example, as 44100 + 110889 = 210^2 + 333^2 .

It is not a de Polignac number, because 154989 - 2³ = 154981 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (154981) 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 11 ways as a sum of consecutive naturals, for example, 354 + ... + 659.

It is an arithmetic number, because the mean of its divisors is an integer number (19773).

2¹⁵⁴⁹⁸⁹ is an apocalyptic number.

It is an amenable number.

154989 is a deficient number, since it is larger than the sum of its proper divisors (82287).

154989 is a wasteful number, since it uses less digits than its factorization.

154989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1036 (or 1033 counting only the distinct ones).

The product of its digits is 12960, while the sum is 36.

The square root of 154989 is about 393.6864234388. The cubic root of 154989 is about 53.7155827981.

The spelling of 154989 in words is "one hundred fifty-four thousand, nine hundred eighty-nine".