138711077 has 24 divisors (see below), whose sum is σ = 154656480. Its totient is φ = 123984000.

The previous prime is 138711073. The next prime is 138711101. The reversal of 138711077 is 770117831.

It is not a de Polignac number, because 138711077 - 2² = 138711073 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 (138711073) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1373327 + ... + 1373427.

It is an arithmetic number, because the mean of its divisors is an integer number (6444020).

Almost surely, 2^138711077 is an apocalyptic number.

It is an amenable number.

138711077 is a deficient number, since it is larger than the sum of its proper divisors (15945403).

138711077 is a wasteful number, since it uses less digits than its factorization.

138711077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245 (or 204 counting only the distinct ones).

The product of its (nonzero) digits is 8232, while the sum is 35.

The square root of 138711077 is about 11777.5666841670. The cubic root of 138711077 is about 517.6509887941.

The spelling of 138711077 in words is "one hundred thirty-eight million, seven hundred eleven thousand, seventy-seven".