1308023139 has 4 divisors (see below), whose sum is σ = 1744030856. Its totient is φ = 872015424.

The previous prime is 1308023117. The next prime is 1308023141. The reversal of 1308023139 is 9313208031.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9313208031 = 3 ⋅3104402677.

It is not a de Polignac number, because 1308023139 - 2⁸ = 1308022883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1308027139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 218003854 + ... + 218003859.

It is an arithmetic number, because the mean of its divisors is an integer number (436007714).

Almost surely, 2^1308023139 is an apocalyptic number.

1308023139 is a deficient number, since it is larger than the sum of its proper divisors (436007717).

1308023139 is an equidigital number, since it uses as much as digits as its factorization.

1308023139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 436007716.

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 1308023139 is about 36166.6025360415. The cubic root of 1308023139 is about 1093.6335098619.

The spelling of 1308023139 in words is "one billion, three hundred eight million, twenty-three thousand, one hundred thirty-nine".