168075997 has 4 divisors (see below), whose sum is σ = 168920800. Its totient is φ = 167231196.

The previous prime is 168075959. The next prime is 168076001. The reversal of 168075997 is 799570861.

It is a happy number.

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 168075997 - 2²⁷ = 33858269 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168075937) 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, 422103 + ... + 422500.

It is an arithmetic number, because the mean of its divisors is an integer number (42230200).

Almost surely, 2^168075997 is an apocalyptic number.

It is an amenable number.

168075997 is a deficient number, since it is larger than the sum of its proper divisors (844803).

168075997 is an equidigital number, since it uses as much as digits as its factorization.

168075997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 844802.

The product of its (nonzero) digits is 952560, while the sum is 52.

The square root of 168075997 is about 12964.4127132701. The cubic root of 168075997 is about 551.8680250988.

It can be divided in two parts, 1680 and 75997, that added together give a palindrome (77677).

The spelling of 168075997 in words is "one hundred sixty-eight million, seventy-five thousand, nine hundred ninety-seven".