154128089 has 4 divisors (see below), whose sum is σ = 155341824. Its totient is φ = 152914356.

The previous prime is 154128077. The next prime is 154128097. The reversal of 154128089 is 980821451.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 154128089 - 2¹² = 154123993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (154128049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 606677 + ... + 606930.

It is an arithmetic number, because the mean of its divisors is an integer number (38835456).

Almost surely, 2^154128089 is an apocalyptic number.

It is an amenable number.

154128089 is a deficient number, since it is larger than the sum of its proper divisors (1213735).

154128089 is a wasteful number, since it uses less digits than its factorization.

154128089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1213734.

The product of its (nonzero) digits is 23040, while the sum is 38.

The square root of 154128089 is about 12414.8334261882. The cubic root of 154128089 is about 536.1594083396.

The spelling of 154128089 in words is "one hundred fifty-four million, one hundred twenty-eight thousand, eighty-nine".