6139739 has 2 divisors, whose sum is σ = 6139740. Its totient is φ = 6139738.

The previous prime is 6139733. The next prime is 6139741. The reversal of 6139739 is 9379316.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6139739 - 2⁴ = 6139723 is a prime.

Together with 6139741, 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 (6139733) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3069869 + 3069870.

It is an arithmetic number, because the mean of its divisors is an integer number (3069870).

Almost surely, 2^6139739 is an apocalyptic number.

6139739 is a deficient number, since it is larger than the sum of its proper divisors (1).

6139739 is an equidigital number, since it uses as much as digits as its factorization.

6139739 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30618, while the sum is 38.

The square root of 6139739 is about 2477.8496725992. The cubic root of 6139739 is about 183.1119285012. Note that the first 3 decimals are identical.

The spelling of 6139739 in words is "six million, one hundred thirty-nine thousand, seven hundred thirty-nine".