168840051 has 4 divisors (see below), whose sum is σ = 225120072. Its totient is φ = 112560032.

The previous prime is 168840047. The next prime is 168840071. The reversal of 168840051 is 150048861.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 150048861 = 3 ⋅50016287.

It is a cyclic number.

It is not a de Polignac number, because 168840051 - 2² = 168840047 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 168839994 and 168840021.

It is not an unprimeable number, because it can be changed into a prime (168840071) 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, 28140006 + ... + 28140011.

It is an arithmetic number, because the mean of its divisors is an integer number (56280018).

Almost surely, 2^168840051 is an apocalyptic number.

168840051 is a deficient number, since it is larger than the sum of its proper divisors (56280021).

168840051 is an equidigital number, since it uses as much as digits as its factorization.

168840051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56280020.

The product of its (nonzero) digits is 7680, while the sum is 33.

The square root of 168840051 is about 12993.8466590921. The cubic root of 168840051 is about 552.7030038262.

The spelling of 168840051 in words is "one hundred sixty-eight million, eight hundred forty thousand, fifty-one".