138086345 has 4 divisors (see below), whose sum is σ = 165703620. Its totient is φ = 110469072.

The previous prime is 138086327. The next prime is 138086363. The reversal of 138086345 is 543680831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 543680831 = 23 ⋅23638297.

It is an interprime number because it is at equal distance from previous prime (138086327) and next prime (138086363).

It can be written as a sum of positive squares in 2 ways, for example, as 101022601 + 37063744 = 10051^2 + 6088^2 .

It is a cyclic number.

It is not a de Polignac number, because 138086345 - 2¹² = 138082249 is a prime.

It is a super-3 number, since 3×138086345³ (a number of 25 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 138086299 and 138086308.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13808630 + ... + 13808639.

It is an arithmetic number, because the mean of its divisors is an integer number (41425905).

Almost surely, 2^138086345 is an apocalyptic number.

It is an amenable number.

138086345 is a deficient number, since it is larger than the sum of its proper divisors (27617275).

138086345 is an equidigital number, since it uses as much as digits as its factorization.

138086345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27617274.

The product of its (nonzero) digits is 69120, while the sum is 38.

The square root of 138086345 is about 11751.0146370430. The cubic root of 138086345 is about 516.8726807065.

The spelling of 138086345 in words is "one hundred thirty-eight million, eighty-six thousand, three hundred forty-five".