168379509 has 16 divisors (see below), whose sum is σ = 241265088. Its totient is φ = 104070912.

The previous prime is 168379493. The next prime is 168379531. The reversal of 168379509 is 905973861.

It is not a de Polignac number, because 168379509 - 2⁴ = 168379493 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168379909) 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 15 ways as a sum of consecutive naturals, for example, 21222 + ... + 28055.

It is an arithmetic number, because the mean of its divisors is an integer number (15079068).

Almost surely, 2^168379509 is an apocalyptic number.

It is an amenable number.

168379509 is a deficient number, since it is larger than the sum of its proper divisors (72885579).

168379509 is a wasteful number, since it uses less digits than its factorization.

168379509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49364.

The product of its (nonzero) digits is 408240, while the sum is 48.

The square root of 168379509 is about 12976.1130158457. The cubic root of 168379509 is about 552.2000135028.

The spelling of 168379509 in words is "one hundred sixty-eight million, three hundred seventy-nine thousand, five hundred nine".