154136393 has 2 divisors, whose sum is σ = 154136394. Its totient is φ = 154136392.

The previous prime is 154136387. The next prime is 154136401. The reversal of 154136393 is 393631451.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 154082569 + 53824 = 12413^2 + 232^2 .

It is a cyclic number.

It is not a de Polignac number, because 154136393 - 2⁶ = 154136329 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (154136293) 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 as a sum of consecutive naturals, namely, 77068196 + 77068197.

It is an arithmetic number, because the mean of its divisors is an integer number (77068197).

Almost surely, 2^154136393 is an apocalyptic number.

It is an amenable number.

154136393 is a deficient number, since it is larger than the sum of its proper divisors (1).

154136393 is an equidigital number, since it uses as much as digits as its factorization.

154136393 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 29160, while the sum is 35.

The square root of 154136393 is about 12415.1678603231. The cubic root of 154136393 is about 536.1690371010.

The spelling of 154136393 in words is "one hundred fifty-four million, one hundred thirty-six thousand, three hundred ninety-three".