138672835 has 8 divisors (see below), whose sum is σ = 190179936. Its totient is φ = 95089920.

The previous prime is 138672829. The next prime is 138672839. The reversal of 138672835 is 538276831.

138672835 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 138672835 - 2⁵ = 138672803 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 138672791 and 138672800.

It is not an unprimeable number, because it can be changed into a prime (138672839) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1981006 + ... + 1981075.

It is an arithmetic number, because the mean of its divisors is an integer number (23772492).

Almost surely, 2^138672835 is an apocalyptic number.

138672835 is a deficient number, since it is larger than the sum of its proper divisors (51507101).

138672835 is an equidigital number, since it uses as much as digits as its factorization.

138672835 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3962093.

The product of its digits is 241920, while the sum is 43.

The square root of 138672835 is about 11775.9430620227. The cubic root of 138672835 is about 517.6034130969.

The spelling of 138672835 in words is "one hundred thirty-eight million, six hundred seventy-two thousand, eight hundred thirty-five".