108939596731 has 4 divisors (see below), whose sum is σ = 124502396272. Its totient is φ = 93376797192.

The previous prime is 108939596719. The next prime is 108939596743. The reversal of 108939596731 is 137695939801.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 137695939801 = 7 ⋅19670848543.

It is an interprime number because it is at equal distance from previous prime (108939596719) and next prime (108939596743).

It is not a de Polignac number, because 108939596731 - 2¹⁷ = 108939465659 is a prime.

It is a super-2 number, since 2×108939596731² (a number of 23 digits) contains 22 as substring.

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 108939596731.

It is not an unprimeable number, because it can be changed into a prime (108939596131) 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, 7781399760 + ... + 7781399773.

It is an arithmetic number, because the mean of its divisors is an integer number (31125599068).

Almost surely, 2^108939596731 is an apocalyptic number.

108939596731 is a deficient number, since it is larger than the sum of its proper divisors (15562799541).

108939596731 is an equidigital number, since it uses as much as digits as its factorization.

108939596731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15562799540.

The product of its (nonzero) digits is 11022480, while the sum is 61.

The spelling of 108939596731 in words is "one hundred eight billion, nine hundred thirty-nine million, five hundred ninety-six thousand, seven hundred thirty-one".