168780131 has 16 divisors (see below), whose sum is σ = 193636800. Its totient is φ = 146600064.

The previous prime is 168780119. The next prime is 168780137. The reversal of 168780131 is 131087861.

It is not a de Polignac number, because 168780131 - 2¹⁴ = 168763747 is a prime.

It is a super-2 number, since 2×168780131² = 56973465240754322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 168780091 and 168780100.

It is not an unprimeable number, because it can be changed into a prime (168780137) 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, 35090 + ... + 39608.

It is an arithmetic number, because the mean of its divisors is an integer number (12102300).

Almost surely, 2^168780131 is an apocalyptic number.

168780131 is a deficient number, since it is larger than the sum of its proper divisors (24856669).

168780131 is an equidigital number, since it uses as much as digits as its factorization.

168780131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4575 (or 4549 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 35.

The square root of 168780131 is about 12991.5407477327. The cubic root of 168780131 is about 552.6376127804.

It can be divided in two parts, 1687 and 80131, that added together give a palindrome (81818).

The spelling of 168780131 in words is "one hundred sixty-eight million, seven hundred eighty thousand, one hundred thirty-one".