168522997 has 4 divisors (see below), whose sum is σ = 172633356. Its totient is φ = 164412640.

The previous prime is 168522983. The next prime is 168523007. The reversal of 168522997 is 799225861.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 45778756 + 122744241 = 6766^2 + 11079^2 .

It is a cyclic number.

It is not a de Polignac number, because 168522997 - 2⁷ = 168522869 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 168522997.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168522917) 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, 2055118 + ... + 2055199.

It is an arithmetic number, because the mean of its divisors is an integer number (43158339).

Almost surely, 2^168522997 is an apocalyptic number.

It is an amenable number.

168522997 is a deficient number, since it is larger than the sum of its proper divisors (4110359).

168522997 is an equidigital number, since it uses as much as digits as its factorization.

168522997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4110358.

The product of its digits is 544320, while the sum is 49.

The square root of 168522997 is about 12981.6407668676. The cubic root of 168522997 is about 552.3568251000.

The spelling of 168522997 in words is "one hundred sixty-eight million, five hundred twenty-two thousand, nine hundred ninety-seven".