168447649 has 8 divisors (see below), whose sum is σ = 169377120. Its totient is φ = 167521536.

The previous prime is 168447647. The next prime is 168447667. The reversal of 168447649 is 946744861.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 168447649 - 2¹ = 168447647 is a prime.

It is a super-2 number, since 2×168447649² = 56749220907254402, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (168447647) 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 7 ways as a sum of consecutive naturals, for example, 255282 + ... + 255940.

It is an arithmetic number, because the mean of its divisors is an integer number (21172140).

Almost surely, 2^168447649 is an apocalyptic number.

It is an amenable number.

168447649 is a deficient number, since it is larger than the sum of its proper divisors (929471).

168447649 is an equidigital number, since it uses as much as digits as its factorization.

168447649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1679.

The product of its digits is 1161216, while the sum is 49.

The square root of 168447649 is about 12978.7383439223. The cubic root of 168447649 is about 552.2744917546.

The spelling of 168447649 in words is "one hundred sixty-eight million, four hundred forty-seven thousand, six hundred forty-nine".