154434139 has 2 divisors, whose sum is σ = 154434140. Its totient is φ = 154434138.

The previous prime is 154434101. The next prime is 154434169. The reversal of 154434139 is 931434451.

It is a strong prime.

It is an emirp because it is prime and its reverse (931434451) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 154434139 - 2¹⁵ = 154401371 is a prime.

It is not a weakly prime, because it can be changed into another prime (154434169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77217069 + 77217070.

It is an arithmetic number, because the mean of its divisors is an integer number (77217070).

Almost surely, 2^154434139 is an apocalyptic number.

154434139 is a deficient number, since it is larger than the sum of its proper divisors (1).

154434139 is an equidigital number, since it uses as much as digits as its factorization.

154434139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25920, while the sum is 34.

The square root of 154434139 is about 12427.1532942987. The cubic root of 154434139 is about 536.5140551276.

The spelling of 154434139 in words is "one hundred fifty-four million, four hundred thirty-four thousand, one hundred thirty-nine".