39138269 has 2 divisors, whose sum is σ = 39138270. Its totient is φ = 39138268.

The previous prime is 39138257. The next prime is 39138283. The reversal of 39138269 is 96283193.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38912644 + 225625 = 6238^2 + 475^2 .

It is a cyclic number.

It is not a de Polignac number, because 39138269 - 2⁸ = 39138013 is a prime.

It is a super-2 number, since 2×39138269² = 3063608200632722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39138569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19569134 + 19569135.

It is an arithmetic number, because the mean of its divisors is an integer number (19569135).

Almost surely, 2^39138269 is an apocalyptic number.

It is an amenable number.

39138269 is a deficient number, since it is larger than the sum of its proper divisors (1).

39138269 is an equidigital number, since it uses as much as digits as its factorization.

39138269 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 69984, while the sum is 41.

The square root of 39138269 is about 6256.0585834853. The cubic root of 39138269 is about 339.5214403399.

The spelling of 39138269 in words is "thirty-nine million, one hundred thirty-eight thousand, two hundred sixty-nine".