138667077 has 12 divisors (see below), whose sum is σ = 203041644. Its totient is φ = 91177920.

The previous prime is 138667033. The next prime is 138667093. The reversal of 138667077 is 770766831.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 60980481 + 77686596 = 7809^2 + 8814^2 .

It is not a de Polignac number, because 138667077 - 2²⁶ = 71558213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138667097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 104874 + ... + 106187.

It is an arithmetic number, because the mean of its divisors is an integer number (16920137).

Almost surely, 2^138667077 is an apocalyptic number.

It is an amenable number.

138667077 is a deficient number, since it is larger than the sum of its proper divisors (64374567).

138667077 is a wasteful number, since it uses less digits than its factorization.

138667077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211140 (or 211137 counting only the distinct ones).

The product of its (nonzero) digits is 296352, while the sum is 45.

The square root of 138667077 is about 11775.6985780038. The cubic root of 138667077 is about 517.5962489884.

The spelling of 138667077 in words is "one hundred thirty-eight million, six hundred sixty-seven thousand, seventy-seven".