168406419 has 16 divisors (see below), whose sum is σ = 228501504. Its totient is φ = 110306400.

The previous prime is 168406411. The next prime is 168406429. The reversal of 168406419 is 914604861.

It is not a de Polignac number, because 168406419 - 2³ = 168406411 is a prime.

It is a super-2 number, since 2×168406419² = 56721443920807122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (168406411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45789 + ... + 49329.

It is an arithmetic number, because the mean of its divisors is an integer number (14281344).

Almost surely, 2^168406419 is an apocalyptic number.

168406419 is a deficient number, since it is larger than the sum of its proper divisors (60095085).

168406419 is a wasteful number, since it uses less digits than its factorization.

168406419 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3818.

The product of its (nonzero) digits is 41472, while the sum is 39.

The square root of 168406419 is about 12977.1498796924. The cubic root of 168406419 is about 552.2294290196.

The spelling of 168406419 in words is "one hundred sixty-eight million, four hundred six thousand, four hundred nineteen".