38538139 has 2 divisors, whose sum is σ = 38538140. Its totient is φ = 38538138.

The previous prime is 38538121. The next prime is 38538169. The reversal of 38538139 is 93183583.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 38538139 - 2¹³ = 38529947 is a prime.

It is not a weakly prime, because it can be changed into another prime (38538169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19269069 + 19269070.

It is an arithmetic number, because the mean of its divisors is an integer number (19269070).

Almost surely, 2^38538139 is an apocalyptic number.

38538139 is a deficient number, since it is larger than the sum of its proper divisors (1).

38538139 is an equidigital number, since it uses as much as digits as its factorization.

38538139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 77760, while the sum is 40.

The square root of 38538139 is about 6207.9093904470. The cubic root of 38538139 is about 337.7771338725. Note that the first 3 decimals are identical.

The spelling of 38538139 in words is "thirty-eight million, five hundred thirty-eight thousand, one hundred thirty-nine".