108142939 has 4 divisors (see below), whose sum is σ = 108183600. Its totient is φ = 108102280.

The previous prime is 108142919. The next prime is 108142961. The reversal of 108142939 is 939241801.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 939241801 = 19 ⋅49433779.

It is a cyclic number.

It is not a de Polignac number, because 108142939 - 2¹¹ = 108140891 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 108142898 and 108142907.

It is not an unprimeable number, because it can be changed into a prime (108142919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16039 + ... + 21760.

It is an arithmetic number, because the mean of its divisors is an integer number (27045900).

Almost surely, 2^108142939 is an apocalyptic number.

108142939 is a deficient number, since it is larger than the sum of its proper divisors (40661).

108142939 is an equidigital number, since it uses as much as digits as its factorization.

108142939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40660.

The product of its (nonzero) digits is 15552, while the sum is 37.

The square root of 108142939 is about 10399.1797272670. The cubic root of 108142939 is about 476.4303169705.

The spelling of 108142939 in words is "one hundred eight million, one hundred forty-two thousand, nine hundred thirty-nine".