138155395 has 8 divisors (see below), whose sum is σ = 189470304. Its totient is φ = 94735104.

The previous prime is 138155393. The next prime is 138155401. The reversal of 138155395 is 593551831.

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 138155395 - 2¹ = 138155393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138155393) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 1973614 + ... + 1973683.

It is an arithmetic number, because the mean of its divisors is an integer number (23683788).

Almost surely, 2^138155395 is an apocalyptic number.

138155395 is a deficient number, since it is larger than the sum of its proper divisors (51314909).

138155395 is an equidigital number, since it uses as much as digits as its factorization.

138155395 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3947309.

The product of its digits is 81000, while the sum is 40.

The square root of 138155395 is about 11753.9523140091. The cubic root of 138155395 is about 516.9588203155.

The spelling of 138155395 in words is "one hundred thirty-eight million, one hundred fifty-five thousand, three hundred ninety-five".