138345311 has 8 divisors (see below), whose sum is σ = 149769984. Its totient is φ = 127032480.

The previous prime is 138345287. The next prime is 138345367. The reversal of 138345311 is 113543831.

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 138345311 - 2⁶ = 138345247 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138341311) 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, 25376 + ... + 30341.

It is an arithmetic number, because the mean of its divisors is an integer number (18721248).

Almost surely, 2^138345311 is an apocalyptic number.

138345311 is a deficient number, since it is larger than the sum of its proper divisors (11424673).

138345311 is a wasteful number, since it uses less digits than its factorization.

138345311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55921.

The product of its digits is 4320, while the sum is 29.

The square root of 138345311 is about 11762.0283539872. The cubic root of 138345311 is about 517.1955918590.

The spelling of 138345311 in words is "one hundred thirty-eight million, three hundred forty-five thousand, three hundred eleven".