168517047 has 4 divisors (see below), whose sum is σ = 224689400. Its totient is φ = 112344696.

The previous prime is 168517003. The next prime is 168517079. The reversal of 168517047 is 740715861.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 740715861 = 3 ⋅246905287.

It is not a de Polignac number, because 168517047 - 2⁶ = 168516983 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 168516996 and 168517014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168517847) 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, 28086172 + ... + 28086177.

It is an arithmetic number, because the mean of its divisors is an integer number (56172350).

Almost surely, 2^168517047 is an apocalyptic number.

168517047 is a deficient number, since it is larger than the sum of its proper divisors (56172353).

168517047 is an equidigital number, since it uses as much as digits as its factorization.

168517047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56172352.

The product of its (nonzero) digits is 47040, while the sum is 39.

The square root of 168517047 is about 12981.4115950462. The cubic root of 168517047 is about 552.3503243813.

The spelling of 168517047 in words is "one hundred sixty-eight million, five hundred seventeen thousand, forty-seven".