168131613 has 16 divisors (see below), whose sum is σ = 241693760. Its totient is φ = 103348224.

The previous prime is 168131599. The next prime is 168131641. The reversal of 168131613 is 316131861.

It is not a de Polignac number, because 168131613 - 2¹² = 168127517 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168131213) 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, 43098 + ... + 46836.

It is an arithmetic number, because the mean of its divisors is an integer number (15105860).

Almost surely, 2^168131613 is an apocalyptic number.

168131613 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

168131613 is a deficient number, since it is larger than the sum of its proper divisors (73562147).

168131613 is a wasteful number, since it uses less digits than its factorization.

168131613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4908.

The product of its digits is 2592, while the sum is 30.

The square root of 168131613 is about 12966.5574845446. The cubic root of 168131613 is about 551.9288890490.

The spelling of 168131613 in words is "one hundred sixty-eight million, one hundred thirty-one thousand, six hundred thirteen".