138926534 has 4 divisors (see below), whose sum is σ = 208389804. Its totient is φ = 69463266.

The previous prime is 138926521. The next prime is 138926539. The reversal of 138926534 is 435629831.

138926534 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 138926491 and 138926500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138926539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34731632 + ... + 34731635.

It is an arithmetic number, because the mean of its divisors is an integer number (52097451).

Almost surely, 2^138926534 is an apocalyptic number.

138926534 is a deficient number, since it is larger than the sum of its proper divisors (69463270).

138926534 is an equidigital number, since it uses as much as digits as its factorization.

138926534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69463269.

The product of its digits is 155520, while the sum is 41.

The square root of 138926534 is about 11786.7100583666. The cubic root of 138926534 is about 517.9188689442.

The spelling of 138926534 in words is "one hundred thirty-eight million, nine hundred twenty-six thousand, five hundred thirty-four".