389040139 has 2 divisors, whose sum is σ = 389040140. Its totient is φ = 389040138.

The previous prime is 389040109. The next prime is 389040149. The reversal of 389040139 is 931040983.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 389040139 - 2⁵ = 389040107 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 389040098 and 389040107.

It is not a weakly prime, because it can be changed into another prime (389040109) 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, 194520069 + 194520070.

It is an arithmetic number, because the mean of its divisors is an integer number (194520070).

Almost surely, 2^389040139 is an apocalyptic number.

389040139 is a deficient number, since it is larger than the sum of its proper divisors (1).

389040139 is an equidigital number, since it uses as much as digits as its factorization.

389040139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23328, while the sum is 37.

The square root of 389040139 is about 19724.1004611110. The cubic root of 389040139 is about 730.0144733479.

The spelling of 389040139 in words is "three hundred eighty-nine million, forty thousand, one hundred thirty-nine".