138044077 has 16 divisors (see below), whose sum is σ = 144671472. Its totient is φ = 131604480.

The previous prime is 138044069. The next prime is 138044083. The reversal of 138044077 is 770440831.

It can be written as a sum of positive squares in 8 ways, for example, as 826281 + 137217796 = 909^2 + 11714^2 .

It is a cyclic number.

It is not a de Polignac number, because 138044077 - 2³ = 138044069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138044057) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 572677 + ... + 572917.

It is an arithmetic number, because the mean of its divisors is an integer number (9041967).

Almost surely, 2^138044077 is an apocalyptic number.

It is an amenable number.

138044077 is a deficient number, since it is larger than the sum of its proper divisors (6627395).

138044077 is a wasteful number, since it uses less digits than its factorization.

138044077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 528.

The product of its (nonzero) digits is 18816, while the sum is 34.

The square root of 138044077 is about 11749.2160163987. The cubic root of 138044077 is about 516.8199373692.

The spelling of 138044077 in words is "one hundred thirty-eight million, forty-four thousand, seventy-seven".