168449257 has 8 divisors (see below), whose sum is σ = 174309632. Its totient is φ = 162615600.

The previous prime is 168449249. The next prime is 168449287. The reversal of 168449257 is 752944861.

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 168449257 - 2³ = 168449249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (168449287) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6598 + ... + 19504.

It is an arithmetic number, because the mean of its divisors is an integer number (21788704).

Almost surely, 2^168449257 is an apocalyptic number.

It is an amenable number.

168449257 is a deficient number, since it is larger than the sum of its proper divisors (5860375).

168449257 is a wasteful number, since it uses less digits than its factorization.

168449257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13359.

The product of its digits is 483840, while the sum is 46.

The square root of 168449257 is about 12978.8002912442. The cubic root of 168449257 is about 552.2762490851.

The spelling of 168449257 in words is "one hundred sixty-eight million, four hundred forty-nine thousand, two hundred fifty-seven".