168049257 has 4 divisors (see below), whose sum is σ = 224065680. Its totient is φ = 112032836.

The previous prime is 168049253. The next prime is 168049291. The reversal of 168049257 is 752940861.

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.

It is a cyclic number.

It is not a de Polignac number, because 168049257 - 2² = 168049253 is a prime.

It is not an unprimeable number, because it can be changed into a prime (168049253) 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, 28008207 + ... + 28008212.

It is an arithmetic number, because the mean of its divisors is an integer number (56016420).

Almost surely, 2^168049257 is an apocalyptic number.

It is an amenable number.

168049257 is a deficient number, since it is larger than the sum of its proper divisors (56016423).

168049257 is an equidigital number, since it uses as much as digits as its factorization.

168049257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56016422.

The product of its (nonzero) digits is 120960, while the sum is 42.

The square root of 168049257 is about 12963.3813875856. The cubic root of 168049257 is about 551.8387571210.

The spelling of 168049257 in words is "one hundred sixty-eight million, forty-nine thousand, two hundred fifty-seven".