154135109 has 4 divisors (see below), whose sum is σ = 154183980. Its totient is φ = 154086240.

The previous prime is 154135103. The next prime is 154135123. The reversal of 154135109 is 901531451.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 73530625 + 80604484 = 8575^2 + 8978^2 .

It is a cyclic number.

It is not a de Polignac number, because 154135109 - 2²⁴ = 137357893 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (154135103) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19352 + ... + 26129.

It is an arithmetic number, because the mean of its divisors is an integer number (38545995).

Almost surely, 2^154135109 is an apocalyptic number.

It is an amenable number.

154135109 is a deficient number, since it is larger than the sum of its proper divisors (48871).

154135109 is an equidigital number, since it uses as much as digits as its factorization.

154135109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48870.

The product of its (nonzero) digits is 2700, while the sum is 29.

The square root of 154135109 is about 12415.1161492754. The cubic root of 154135109 is about 536.1675482833.

The spelling of 154135109 in words is "one hundred fifty-four million, one hundred thirty-five thousand, one hundred nine".