168849523 has 4 divisors (see below), whose sum is σ = 177736360. Its totient is φ = 159962688.

The previous prime is 168849517. The next prime is 168849617. The reversal of 168849523 is 325948861.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 325948861 = 7 ⋅46564123.

It is a cyclic number.

It is not a de Polignac number, because 168849523 - 2²⁵ = 135295091 is a prime.

It is a super-2 number, since 2×168849523² = 57020322834655058, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (168849823) 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 3 ways as a sum of consecutive naturals, for example, 4443390 + ... + 4443427.

It is an arithmetic number, because the mean of its divisors is an integer number (44434090).

Almost surely, 2^168849523 is an apocalyptic number.

168849523 is a deficient number, since it is larger than the sum of its proper divisors (8886837).

168849523 is an equidigital number, since it uses as much as digits as its factorization.

168849523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8886836.

The product of its digits is 414720, while the sum is 46.

The square root of 168849523 is about 12994.2111341936. The cubic root of 168849523 is about 552.7133392589.

The spelling of 168849523 in words is "one hundred sixty-eight million, eight hundred forty-nine thousand, five hundred twenty-three".