168436849 has 4 divisors (see below), whose sum is σ = 192499264. Its totient is φ = 144374436.

The previous prime is 168436847. The next prime is 168436859. The reversal of 168436849 is 948634861.

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: 948634861 = 373 ⋅2543257.

It is a cyclic number.

It is not a de Polignac number, because 168436849 - 2¹ = 168436847 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (168436847) 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, 12031197 + ... + 12031210.

It is an arithmetic number, because the mean of its divisors is an integer number (48124816).

Almost surely, 2^168436849 is an apocalyptic number.

It is an amenable number.

168436849 is a deficient number, since it is larger than the sum of its proper divisors (24062415).

168436849 is an equidigital number, since it uses as much as digits as its factorization.

168436849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24062414.

The product of its digits is 995328, while the sum is 49.

The square root of 168436849 is about 12978.3222721583. The cubic root of 168436849 is about 552.2626884990.

The spelling of 168436849 in words is "one hundred sixty-eight million, four hundred thirty-six thousand, eight hundred forty-nine".