138876077 has 16 divisors (see below), whose sum is σ = 150584112. Its totient is φ = 127595520.

The previous prime is 138876053. The next prime is 138876091. The reversal of 138876077 is 770678831.

It can be written as a sum of positive squares in 8 ways, for example, as 35772361 + 103103716 = 5981^2 + 10154^2 .

It is a cyclic number.

It is not a de Polignac number, because 138876077 - 2⁶ = 138876013 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138876037) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 162383 + ... + 163235.

It is an arithmetic number, because the mean of its divisors is an integer number (9411507).

Almost surely, 2^138876077 is an apocalyptic number.

138876077 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

138876077 is a deficient number, since it is larger than the sum of its proper divisors (11708035).

138876077 is a wasteful number, since it uses less digits than its factorization.

138876077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1088.

The product of its (nonzero) digits is 395136, while the sum is 47.

The square root of 138876077 is about 11784.5694448291. The cubic root of 138876077 is about 517.8561600289.

The spelling of 138876077 in words is "one hundred thirty-eight million, eight hundred seventy-six thousand, seventy-seven".