168883409 has 4 divisors (see below), whose sum is σ = 168926016. Its totient is φ = 168840804.

The previous prime is 168883399. The next prime is 168883427. The reversal of 168883409 is 904388861.

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: 904388861 = 6653 ⋅135937.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-168883409 is a prime.

It is a super-2 number, since 2×168883409² = 57043211670922562, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (168883439) 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, 14669 + ... + 23514.

It is an arithmetic number, because the mean of its divisors is an integer number (42231504).

Almost surely, 2^168883409 is an apocalyptic number.

It is an amenable number.

168883409 is a deficient number, since it is larger than the sum of its proper divisors (42607).

168883409 is an equidigital number, since it uses as much as digits as its factorization.

168883409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42606.

The product of its (nonzero) digits is 331776, while the sum is 47.

The square root of 168883409 is about 12995.5149570919. The cubic root of 168883409 is about 552.7503110175.

The spelling of 168883409 in words is "one hundred sixty-eight million, eight hundred eighty-three thousand, four hundred nine".