38405911 has 2 divisors, whose sum is σ = 38405912. Its totient is φ = 38405910.

The previous prime is 38405893. The next prime is 38405933. The reversal of 38405911 is 11950483.

It is a weak prime.

It is an emirp because it is prime and its reverse (11950483) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-38405911 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38405951) 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, 19202955 + 19202956.

It is an arithmetic number, because the mean of its divisors is an integer number (19202956).

Almost surely, 2^38405911 is an apocalyptic number.

38405911 is a deficient number, since it is larger than the sum of its proper divisors (1).

38405911 is an equidigital number, since it uses as much as digits as its factorization.

38405911 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 38405911 is about 6197.2502773407. The cubic root of 38405911 is about 337.3903761023.

The spelling of 38405911 in words is "thirty-eight million, four hundred five thousand, nine hundred eleven".