38161639 has 2 divisors, whose sum is σ = 38161640. Its totient is φ = 38161638.

The previous prime is 38161637. The next prime is 38161649. The reversal of 38161639 is 93616183.

38161639 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 an emirp because it is prime and its reverse (93616183) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 38161639 - 2¹ = 38161637 is a prime.

Together with 38161637, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 38161598 and 38161607.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38161637) 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, 19080819 + 19080820.

It is an arithmetic number, because the mean of its divisors is an integer number (19080820).

Almost surely, 2^38161639 is an apocalyptic number.

38161639 is a deficient number, since it is larger than the sum of its proper divisors (1).

38161639 is an equidigital number, since it uses as much as digits as its factorization.

38161639 is an odious number, because the sum of its binary digits is odd.

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

The square root of 38161639 is about 6177.5107446285. The cubic root of 38161639 is about 336.6735561552.

The spelling of 38161639 in words is "thirty-eight million, one hundred sixty-one thousand, six hundred thirty-nine".