138321035 has 4 divisors (see below), whose sum is σ = 165985248. Its totient is φ = 110656824.

The previous prime is 138321023. The next prime is 138321037. The reversal of 138321035 is 530123831.

138321035 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 cyclic number.

It is not a de Polignac number, because 138321035 - 2⁶ = 138320971 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 138320995 and 138321013.

It is not an unprimeable number, because it can be changed into a prime (138321037) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13832099 + ... + 13832108.

It is an arithmetic number, because the mean of its divisors is an integer number (41496312).

Almost surely, 2^138321035 is an apocalyptic number.

138321035 is a deficient number, since it is larger than the sum of its proper divisors (27664213).

138321035 is an equidigital number, since it uses as much as digits as its factorization.

138321035 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27664212.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 138321035 is about 11760.9963438477. The cubic root of 138321035 is about 517.1653386360.

Adding to 138321035 its reverse (530123831), we get a palindrome (668444866).

The spelling of 138321035 in words is "one hundred thirty-eight million, three hundred twenty-one thousand, thirty-five".