38397389 has 2 divisors, whose sum is σ = 38397390. Its totient is φ = 38397388.

The previous prime is 38397383. The next prime is 38397391. The reversal of 38397389 is 98379383.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 32296489 + 6100900 = 5683^2 + 2470^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-38397389 is a prime.

It is a Sophie Germain prime.

Together with 38397391, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38397383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19198694 + 19198695.

It is an arithmetic number, because the mean of its divisors is an integer number (19198695).

Almost surely, 2^38397389 is an apocalyptic number.

It is an amenable number.

38397389 is a deficient number, since it is larger than the sum of its proper divisors (1).

38397389 is an equidigital number, since it uses as much as digits as its factorization.

38397389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 979776, while the sum is 50.

The square root of 38397389 is about 6196.5626761940. The cubic root of 38397389 is about 337.3654194103.

The spelling of 38397389 in words is "thirty-eight million, three hundred ninety-seven thousand, three hundred eighty-nine".