38393857 has 2 divisors, whose sum is σ = 38393858. Its totient is φ = 38393856.

The previous prime is 38393843. The next prime is 38393867. The reversal of 38393857 is 75839383.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36675136 + 1718721 = 6056^2 + 1311^2 .

It is an emirp because it is prime and its reverse (75839383) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-38393857 is a prime.

It is not a weakly prime, because it can be changed into another prime (38393867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19196928 + 19196929.

It is an arithmetic number, because the mean of its divisors is an integer number (19196929).

Almost surely, 2^38393857 is an apocalyptic number.

It is an amenable number.

38393857 is a deficient number, since it is larger than the sum of its proper divisors (1).

38393857 is an equidigital number, since it uses as much as digits as its factorization.

38393857 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 544320, while the sum is 46.

The square root of 38393857 is about 6196.2776729259. The cubic root of 38393857 is about 337.3550748597.

The spelling of 38393857 in words is "thirty-eight million, three hundred ninety-three thousand, eight hundred fifty-seven".