168203878247 has 4 divisors (see below), whose sum is σ = 170961318936. Its totient is φ = 165446437560.

The previous prime is 168203878237. The next prime is 168203878273. The reversal of 168203878247 is 742878302861.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 742878302861 = 9187 ⋅80861903.

It is a cyclic number.

It is not a de Polignac number, because 168203878247 - 2⁸ = 168203877991 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 168203878192 and 168203878201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168203878237) 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, 1378720253 + ... + 1378720374.

It is an arithmetic number, because the mean of its divisors is an integer number (42740329734).

Almost surely, 2^168203878247 is an apocalyptic number.

168203878247 is a deficient number, since it is larger than the sum of its proper divisors (2757440689).

168203878247 is an equidigital number, since it uses as much as digits as its factorization.

168203878247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2757440688.

The product of its (nonzero) digits is 7225344, while the sum is 56.

The spelling of 168203878247 in words is "one hundred sixty-eight billion, two hundred three million, eight hundred seventy-eight thousand, two hundred forty-seven".