154430139 has 4 divisors (see below), whose sum is σ = 205906856. Its totient is φ = 102953424.

The previous prime is 154430123. The next prime is 154430141. The reversal of 154430139 is 931034451.

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

It is not a de Polignac number, because 154430139 - 2⁴ = 154430123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (154430179) 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, 25738354 + ... + 25738359.

It is an arithmetic number, because the mean of its divisors is an integer number (51476714).

Almost surely, 2^154430139 is an apocalyptic number.

154430139 is a deficient number, since it is larger than the sum of its proper divisors (51476717).

154430139 is an equidigital number, since it uses as much as digits as its factorization.

154430139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51476716.

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 154430139 is about 12426.9923553529. The cubic root of 154430139 is about 536.5094230026.

The spelling of 154430139 in words is "one hundred fifty-four million, four hundred thirty thousand, one hundred thirty-nine".