168428499 has 8 divisors (see below), whose sum is σ = 225712080. Its totient is φ = 111715296.

The previous prime is 168428479. The next prime is 168428531. The reversal of 168428499 is 994824861.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 168428499 - 2⁷ = 168428371 is a prime.

It is not an unprimeable number, because it can be changed into a prime (168428479) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 141904 + ... + 143085.

It is an arithmetic number, because the mean of its divisors is an integer number (28214010).

Almost surely, 2^168428499 is an apocalyptic number.

168428499 is a deficient number, since it is larger than the sum of its proper divisors (57283581).

168428499 is a wasteful number, since it uses less digits than its factorization.

168428499 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285189.

The product of its digits is 995328, while the sum is 51.

The square root of 168428499 is about 12978.0005779011. Note that the first 3 decimals coincide. The cubic root of 168428499 is about 552.2535624879.

The spelling of 168428499 in words is "one hundred sixty-eight million, four hundred twenty-eight thousand, four hundred ninety-nine".