389377139 has 2 divisors, whose sum is σ = 389377140. Its totient is φ = 389377138.

The previous prime is 389377117. The next prime is 389377141. The reversal of 389377139 is 931773983.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-389377139 is a prime.

It is a super-2 number, since 2×389377139² = 303229112751650642, which contains 22 as substring.

Together with 389377141, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (389377199) 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, 194688569 + 194688570.

It is an arithmetic number, because the mean of its divisors is an integer number (194688570).

Almost surely, 2^389377139 is an apocalyptic number.

389377139 is a deficient number, since it is larger than the sum of its proper divisors (1).

389377139 is an equidigital number, since it uses as much as digits as its factorization.

389377139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 857304, while the sum is 50.

The square root of 389377139 is about 19732.6414602810. The cubic root of 389377139 is about 730.2252004267.

The spelling of 389377139 in words is "three hundred eighty-nine million, three hundred seventy-seven thousand, one hundred thirty-nine".