138201379 has 4 divisors (see below), whose sum is σ = 142659520. Its totient is φ = 133743240.

The previous prime is 138201377. The next prime is 138201397. The reversal of 138201379 is 973102831.

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 138201379 - 2¹ = 138201377 is a prime.

It is not an unprimeable number, because it can be changed into a prime (138201377) 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, 2229024 + ... + 2229085.

It is an arithmetic number, because the mean of its divisors is an integer number (35664880).

Almost surely, 2^138201379 is an apocalyptic number.

138201379 is a deficient number, since it is larger than the sum of its proper divisors (4458141).

138201379 is an equidigital number, since it uses as much as digits as its factorization.

138201379 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4458140.

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 138201379 is about 11755.9082592542. The cubic root of 138201379 is about 517.0161692581.

The spelling of 138201379 in words is "one hundred thirty-eight million, two hundred one thousand, three hundred seventy-nine".