138498039 has 8 divisors (see below), whose sum is σ = 205182320. Its totient is φ = 92332008.

The previous prime is 138498037. The next prime is 138498043. The reversal of 138498039 is 930894831.

It is not a de Polignac number, because 138498039 - 2¹ = 138498037 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 138497985 and 138498003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138498037) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2564752 + ... + 2564805.

It is an arithmetic number, because the mean of its divisors is an integer number (25647790).

Almost surely, 2^138498039 is an apocalyptic number.

138498039 is a deficient number, since it is larger than the sum of its proper divisors (66684281).

138498039 is an equidigital number, since it uses as much as digits as its factorization.

138498039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5129566 (or 5129560 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 45.

The square root of 138498039 is about 11768.5189807384. The cubic root of 138498039 is about 517.3858433348.

The spelling of 138498039 in words is "one hundred thirty-eight million, four hundred ninety-eight thousand, thirty-nine".