38839949 has 2 divisors, whose sum is σ = 38839950. Its totient is φ = 38839948.

The previous prime is 38839921. The next prime is 38839987. The reversal of 38839949 is 94993883.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28015849 + 10824100 = 5293^2 + 3290^2 .

It is a cyclic number.

It is not a de Polignac number, because 38839949 - 2⁸ = 38839693 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 38839949.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38839919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19419974 + 19419975.

It is an arithmetic number, because the mean of its divisors is an integer number (19419975).

Almost surely, 2^38839949 is an apocalyptic number.

It is an amenable number.

38839949 is a deficient number, since it is larger than the sum of its proper divisors (1).

38839949 is an equidigital number, since it uses as much as digits as its factorization.

38839949 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1679616, while the sum is 53.

The square root of 38839949 is about 6232.1704886821. The cubic root of 38839949 is about 338.6566050178.

The spelling of 38839949 in words is "thirty-eight million, eight hundred thirty-nine thousand, nine hundred forty-nine".