138740077 has 16 divisors (see below), whose sum is σ = 170197632. Its totient is φ = 110384640.

The previous prime is 138740051. The next prime is 138740113. The reversal of 138740077 is 770047831.

It is a cyclic number.

It is not a de Polignac number, because 138740077 - 2⁷ = 138739949 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 (138740027) 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, 702 + ... + 16672.

It is an arithmetic number, because the mean of its divisors is an integer number (10637352).

Almost surely, 2^138740077 is an apocalyptic number.

138740077 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

138740077 is a deficient number, since it is larger than the sum of its proper divisors (31457555).

138740077 is a wasteful number, since it uses less digits than its factorization.

138740077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16068.

The product of its (nonzero) digits is 32928, while the sum is 37.

The square root of 138740077 is about 11778.7977739666. The cubic root of 138740077 is about 517.6870609737.

The spelling of 138740077 in words is "one hundred thirty-eight million, seven hundred forty thousand, seventy-seven".