138513626 has 8 divisors (see below), whose sum is σ = 207837684. Its totient is φ = 69234400.

The previous prime is 138513619. The next prime is 138513643. The reversal of 138513626 is 626315831.

It can be written as a sum of positive squares in 2 ways, for example, as 136913401 + 1600225 = 11701^2 + 1265^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1955 + ... + 16758.

Almost surely, 2^138513626 is an apocalyptic number.

138513626 is a deficient number, since it is larger than the sum of its proper divisors (69324058).

138513626 is a wasteful number, since it uses less digits than its factorization.

138513626 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22416.

The product of its digits is 25920, while the sum is 35.

The square root of 138513626 is about 11769.1811949685. The cubic root of 138513626 is about 517.4052520106.

The spelling of 138513626 in words is "one hundred thirty-eight million, five hundred thirteen thousand, six hundred twenty-six".