154789985 has 8 divisors (see below), whose sum is σ = 212283456. Its totient is φ = 106141680.

The previous prime is 154789939. The next prime is 154790039. The reversal of 154789985 is 589987451.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 154789985 - 2⁸ = 154789729 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 154789985.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2211251 + ... + 2211320.

It is an arithmetic number, because the mean of its divisors is an integer number (26535432).

Almost surely, 2^154789985 is an apocalyptic number.

It is an amenable number.

154789985 is a deficient number, since it is larger than the sum of its proper divisors (57493471).

154789985 is an equidigital number, since it uses as much as digits as its factorization.

154789985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4422583.

The product of its digits is 3628800, while the sum is 56.

The square root of 154789985 is about 12441.4623336648. The cubic root of 154789985 is about 536.9258162686.

The spelling of 154789985 in words is "one hundred fifty-four million, seven hundred eighty-nine thousand, nine hundred eighty-five".