1154868139 has 2 divisors, whose sum is σ = 1154868140. Its totient is φ = 1154868138.

The previous prime is 1154868119. The next prime is 1154868173. The reversal of 1154868139 is 9318684511.

It is a weak prime.

It is an emirp because it is prime and its reverse (9318684511) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1154868139 - 2⁹ = 1154867627 is a prime.

It is not a weakly prime, because it can be changed into another prime (1154868109) 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, 577434069 + 577434070.

It is an arithmetic number, because the mean of its divisors is an integer number (577434070).

Almost surely, 2^1154868139 is an apocalyptic number.

1154868139 is a deficient number, since it is larger than the sum of its proper divisors (1).

1154868139 is an equidigital number, since it uses as much as digits as its factorization.

1154868139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 207360, while the sum is 46.

The square root of 1154868139 is about 33983.3509089377. The cubic root of 1154868139 is about 1049.1658193893.

The spelling of 1154868139 in words is "one billion, one hundred fifty-four million, eight hundred sixty-eight thousand, one hundred thirty-nine".