138115499 has 2 divisors, whose sum is σ = 138115500. Its totient is φ = 138115498.

The previous prime is 138115477. The next prime is 138115501. The reversal of 138115499 is 994511831.

It is a strong prime.

It is an emirp because it is prime and its reverse (994511831) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 138115499 - 2¹⁶ = 138049963 is a prime.

Together with 138115501, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (138115399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69057749 + 69057750.

It is an arithmetic number, because the mean of its divisors is an integer number (69057750).

Almost surely, 2^138115499 is an apocalyptic number.

138115499 is a deficient number, since it is larger than the sum of its proper divisors (1).

138115499 is an equidigital number, since it uses as much as digits as its factorization.

138115499 is an evil number, because the sum of its binary digits is even.

The product of its digits is 38880, while the sum is 41.

The square root of 138115499 is about 11752.2550602001. The cubic root of 138115499 is about 516.9090537110.

The spelling of 138115499 in words is "one hundred thirty-eight million, one hundred fifteen thousand, four hundred ninety-nine".