30838139 has 2 divisors, whose sum is σ = 30838140. Its totient is φ = 30838138.

The previous prime is 30838091. The next prime is 30838141. The reversal of 30838139 is 93183803.

It is a strong prime.

It is an emirp because it is prime and its reverse (93183803) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 30838139 - 2⁸ = 30837883 is a prime.

Together with 30838141, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 30838099 and 30838108.

It is not a weakly prime, because it can be changed into another prime (30838169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15419069 + 15419070.

It is an arithmetic number, because the mean of its divisors is an integer number (15419070).

Almost surely, 2^30838139 is an apocalyptic number.

30838139 is a deficient number, since it is larger than the sum of its proper divisors (1).

30838139 is an equidigital number, since it uses as much as digits as its factorization.

30838139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 30838139 is about 5553.2097925434. The cubic root of 30838139 is about 313.5903721783.

The spelling of 30838139 in words is "thirty million, eight hundred thirty-eight thousand, one hundred thirty-nine".