168493697 has 6 divisors (see below), whose sum is σ = 169876758. Its totient is φ = 167112992.

The previous prime is 168493693. The next prime is 168493733. The reversal of 168493697 is 796394861.

It can be written as a sum of positive squares in 3 ways, for example, as 8116801 + 160376896 = 2849^2 + 12664^2 .

It is not a de Polignac number, because 168493697 - 2² = 168493693 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 (168493693) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 151379 + ... + 152487.

It is an arithmetic number, because the mean of its divisors is an integer number (28312793).

Almost surely, 2^168493697 is an apocalyptic number.

It is an amenable number.

168493697 is a deficient number, since it is larger than the sum of its proper divisors (1383061).

168493697 is an frugal number, since it uses more digits than its factorization.

168493697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2355 (or 1246 counting only the distinct ones).

The product of its digits is 1959552, while the sum is 53.

The square root of 168493697 is about 12980.5122009881. The cubic root of 168493697 is about 552.3248116789.

The spelling of 168493697 in words is "one hundred sixty-eight million, four hundred ninety-three thousand, six hundred ninety-seven".