168397419 has 8 divisors (see below), whose sum is σ = 225908032. Its totient is φ = 111575880.

The previous prime is 168397409. The next prime is 168397423. The reversal of 168397419 is 914793861.

It is a happy number.

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

It is not a de Polignac number, because 168397419 - 2¹¹ = 168395371 is a prime.

It is a super-2 number, since 2×168397419² = 56715381451723122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (168397409) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 171697 + ... + 172674.

It is an arithmetic number, because the mean of its divisors is an integer number (28238504).

Almost surely, 2^168397419 is an apocalyptic number.

168397419 is a deficient number, since it is larger than the sum of its proper divisors (57510613).

168397419 is a wasteful number, since it uses less digits than its factorization.

168397419 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 344537.

The product of its digits is 326592, while the sum is 48.

The square root of 168397419 is about 12976.8031117067. The cubic root of 168397419 is about 552.2195914029.

The spelling of 168397419 in words is "one hundred sixty-eight million, three hundred ninety-seven thousand, four hundred nineteen".