139004023 has 2 divisors, whose sum is σ = 139004024. Its totient is φ = 139004022.

The previous prime is 139004017. The next prime is 139004071. The reversal of 139004023 is 320400931.

It is a weak prime.

It is an emirp because it is prime and its reverse (320400931) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 139004023 - 2²¹ = 136906871 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 139003985 and 139004003.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (139004123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69502011 + 69502012.

It is an arithmetic number, because the mean of its divisors is an integer number (69502012).

Almost surely, 2^139004023 is an apocalyptic number.

139004023 is a deficient number, since it is larger than the sum of its proper divisors (1).

139004023 is an equidigital number, since it uses as much as digits as its factorization.

139004023 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 139004023 is about 11789.9967345203. The cubic root of 139004023 is about 518.0151441834.

Adding to 139004023 its reverse (320400931), we get a palindrome (459404954).

The spelling of 139004023 in words is "one hundred thirty-nine million, four thousand, twenty-three".