138034805 has 4 divisors (see below), whose sum is σ = 165641772. Its totient is φ = 110427840.

The previous prime is 138034801. The next prime is 138034837. The reversal of 138034805 is 508430831.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 508430831 = 2741 ⋅185491.

It can be written as a sum of positive squares in 2 ways, for example, as 66699889 + 71334916 = 8167^2 + 8446^2 .

It is not a de Polignac number, because 138034805 - 2² = 138034801 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138034801) 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, 13803476 + ... + 13803485.

It is an arithmetic number, because the mean of its divisors is an integer number (41410443).

Almost surely, 2^138034805 is an apocalyptic number.

It is an amenable number.

138034805 is a deficient number, since it is larger than the sum of its proper divisors (27606967).

138034805 is an equidigital number, since it uses as much as digits as its factorization.

138034805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27606966.

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 138034805 is about 11748.8214302542. The cubic root of 138034805 is about 516.8083660367.

The spelling of 138034805 in words is "one hundred thirty-eight million, thirty-four thousand, eight hundred five".