138342379 has 8 divisors (see below), whose sum is σ = 167406048. Its totient is φ = 111603840.

The previous prime is 138342377. The next prime is 138342403. The reversal of 138342379 is 973243831.

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

It is a cyclic number.

It is not a de Polignac number, because 138342379 - 2¹ = 138342377 is a prime.

It is a super-2 number, since 2×138342379² = 38277227654759282, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138342377) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 581152 + ... + 581389.

It is an arithmetic number, because the mean of its divisors is an integer number (20925756).

Almost surely, 2^138342379 is an apocalyptic number.

138342379 is a deficient number, since it is larger than the sum of its proper divisors (29063669).

138342379 is a wasteful number, since it uses less digits than its factorization.

138342379 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1162565.

The product of its digits is 108864, while the sum is 40.

The square root of 138342379 is about 11761.9037149604. The cubic root of 138342379 is about 517.1919381315.

The spelling of 138342379 in words is "one hundred thirty-eight million, three hundred forty-two thousand, three hundred seventy-nine".