168749051 has 4 divisors (see below), whose sum is σ = 177630600. Its totient is φ = 159867504.

The previous prime is 168749047. The next prime is 168749093. The reversal of 168749051 is 150947861.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 150947861 = 281 ⋅537181.

It is a cyclic number.

It is not a de Polignac number, because 168749051 - 2² = 168749047 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (168749011) 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, 4440746 + ... + 4440783.

It is an arithmetic number, because the mean of its divisors is an integer number (44407650).

Almost surely, 2^168749051 is an apocalyptic number.

168749051 is a deficient number, since it is larger than the sum of its proper divisors (8881549).

168749051 is an equidigital number, since it uses as much as digits as its factorization.

168749051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8881548.

The product of its (nonzero) digits is 60480, while the sum is 41.

The square root of 168749051 is about 12990.3445296882. The cubic root of 168749051 is about 552.6036888990.

The spelling of 168749051 in words is "one hundred sixty-eight million, seven hundred forty-nine thousand, fifty-one".