138458137 has 4 divisors (see below), whose sum is σ = 144478080. Its totient is φ = 132438196.

The previous prime is 138458119. The next prime is 138458141. The reversal of 138458137 is 731854831.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 731854831 = 1669 ⋅438499.

It is a cyclic number.

It is not a de Polignac number, because 138458137 - 2¹⁵ = 138425369 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 138458137.

It is not an unprimeable number, because it can be changed into a prime (138458167) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3009937 + ... + 3009982.

It is an arithmetic number, because the mean of its divisors is an integer number (36119520).

Almost surely, 2^138458137 is an apocalyptic number.

It is an amenable number.

138458137 is a deficient number, since it is larger than the sum of its proper divisors (6019943).

138458137 is an equidigital number, since it uses as much as digits as its factorization.

138458137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6019942.

The product of its digits is 80640, while the sum is 40.

The square root of 138458137 is about 11766.8235730804. The cubic root of 138458137 is about 517.3361513848.

The spelling of 138458137 in words is "one hundred thirty-eight million, four hundred fifty-eight thousand, one hundred thirty-seven".