38117839 has 2 divisors, whose sum is σ = 38117840. Its totient is φ = 38117838.

The previous prime is 38117837. The next prime is 38117851. The reversal of 38117839 is 93871183.

38117839 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 38117839 - 2¹ = 38117837 is a prime.

It is a super-4 number, since 4×38117839⁴ (a number of 31 digits) contains 4444 as substring.

Together with 38117837, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38117837) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19058919 + 19058920.

It is an arithmetic number, because the mean of its divisors is an integer number (19058920).

Almost surely, 2^38117839 is an apocalyptic number.

38117839 is a deficient number, since it is larger than the sum of its proper divisors (1).

38117839 is an equidigital number, since it uses as much as digits as its factorization.

38117839 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36288, while the sum is 40.

The square root of 38117839 is about 6173.9646095520. The cubic root of 38117839 is about 336.5447012158.

The spelling of 38117839 in words is "thirty-eight million, one hundred seventeen thousand, eight hundred thirty-nine".