168121417 has 4 divisors (see below), whose sum is σ = 168153040. Its totient is φ = 168089796.

The previous prime is 168121411. The next prime is 168121423. The reversal of 168121417 is 714121861.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 714121861 = 881 ⋅810581.

It is an interprime number because it is at equal distance from previous prime (168121411) and next prime (168121423).

It is a cyclic number.

It is not a de Polignac number, because 168121417 - 2²⁷ = 33903689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (168121411) 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, 5667 + ... + 19192.

It is an arithmetic number, because the mean of its divisors is an integer number (42038260).

Almost surely, 2^168121417 is an apocalyptic number.

It is an amenable number.

168121417 is a deficient number, since it is larger than the sum of its proper divisors (31623).

168121417 is an equidigital number, since it uses as much as digits as its factorization.

168121417 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31622.

The product of its digits is 2688, while the sum is 31.

The square root of 168121417 is about 12966.1643133195. The cubic root of 168121417 is about 551.9177319548.

The spelling of 168121417 in words is "one hundred sixty-eight million, one hundred twenty-one thousand, four hundred seventeen".