162108139 has 4 divisors (see below), whose sum is σ = 162234424. Its totient is φ = 161981856.

The previous prime is 162108109. The next prime is 162108161. The reversal of 162108139 is 931801261.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 931801261 = 107 ⋅8708423.

It is a cyclic number.

It is not a de Polignac number, because 162108139 - 2²⁵ = 128553707 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 162108139.

It is not an unprimeable number, because it can be changed into a prime (162108109) 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, 61197 + ... + 63790.

It is an arithmetic number, because the mean of its divisors is an integer number (40558606).

Almost surely, 2^162108139 is an apocalyptic number.

162108139 is a deficient number, since it is larger than the sum of its proper divisors (126285).

162108139 is a wasteful number, since it uses less digits than its factorization.

162108139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126284.

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 162108139 is about 12732.1694537891. The cubic root of 162108139 is about 545.2574481563.

The spelling of 162108139 in words is "one hundred sixty-two million, one hundred eight thousand, one hundred thirty-nine".