138310871 has 4 divisors (see below), whose sum is σ = 142772544. Its totient is φ = 133849200.

The previous prime is 138310859. The next prime is 138310883. The reversal of 138310871 is 178013831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 178013831 = 19 ⋅9369149.

It is an interprime number because it is at equal distance from previous prime (138310859) and next prime (138310883).

It is a cyclic number.

It is not a de Polignac number, because 138310871 - 2⁶ = 138310807 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138310811) 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, 2230790 + ... + 2230851.

It is an arithmetic number, because the mean of its divisors is an integer number (35693136).

Almost surely, 2^138310871 is an apocalyptic number.

138310871 is a deficient number, since it is larger than the sum of its proper divisors (4461673).

138310871 is an equidigital number, since it uses as much as digits as its factorization.

138310871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4461672.

The product of its (nonzero) digits is 4032, while the sum is 32.

The square root of 138310871 is about 11760.5642296618. The cubic root of 138310871 is about 517.1526710103.

The spelling of 138310871 in words is "one hundred thirty-eight million, three hundred ten thousand, eight hundred seventy-one".