139423043 has 2 divisors, whose sum is σ = 139423044. Its totient is φ = 139423042.

The previous prime is 139423021. The next prime is 139423061. The reversal of 139423043 is 340324931.

139423043 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 139423043 - 2⁶ = 139422979 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 139422997 and 139423015.

It is not a weakly prime, because it can be changed into another prime (139423073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69711521 + 69711522.

It is an arithmetic number, because the mean of its divisors is an integer number (69711522).

Almost surely, 2^139423043 is an apocalyptic number.

139423043 is a deficient number, since it is larger than the sum of its proper divisors (1).

139423043 is an equidigital number, since it uses as much as digits as its factorization.

139423043 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 29.

The square root of 139423043 is about 11807.7535119937. The cubic root of 139423043 is about 518.5351314512.

Adding to 139423043 its reverse (340324931), we get a palindrome (479747974).

The spelling of 139423043 in words is "one hundred thirty-nine million, four hundred twenty-three thousand, forty-three".