138933499 has 2 divisors, whose sum is σ = 138933500. Its totient is φ = 138933498.

The previous prime is 138933497. The next prime is 138933569. The reversal of 138933499 is 994339831.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 138933499 - 2¹ = 138933497 is a prime.

Together with 138933497, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (138933497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69466749 + 69466750.

It is an arithmetic number, because the mean of its divisors is an integer number (69466750).

Almost surely, 2^138933499 is an apocalyptic number.

138933499 is a deficient number, since it is larger than the sum of its proper divisors (1).

138933499 is an equidigital number, since it uses as much as digits as its factorization.

138933499 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 629856, while the sum is 49.

The square root of 138933499 is about 11787.0055145486. The cubic root of 138933499 is about 517.9275239854.

The spelling of 138933499 in words is "one hundred thirty-eight million, nine hundred thirty-three thousand, four hundred ninety-nine".