168359945 has 24 divisors (see below), whose sum is σ = 221251464. Its totient is φ = 122259456.

The previous prime is 168359941. The next prime is 168359951. The reversal of 168359945 is 549953861.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 35557369 + 132802576 = 5963^2 + 11524^2 .

It is not a de Polignac number, because 168359945 - 2² = 168359941 is a prime.

It is a Duffinian number.

Its product of digits (1166400) is a multiple of the sum of its prime factors (729).

It is a nialpdrome in base 15.

It is a junction number, because it is equal to n+sod(n) for n = 168359893 and 168359902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168359941) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 291497 + ... + 292073.

It is an arithmetic number, because the mean of its divisors is an integer number (9218811).

Almost surely, 2^168359945 is an apocalyptic number.

It is an amenable number.

168359945 is a deficient number, since it is larger than the sum of its proper divisors (52891519).

168359945 is an equidigital number, since it uses as much as digits as its factorization.

168359945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 729 (or 662 counting only the distinct ones).

The product of its digits is 1166400, while the sum is 50.

The square root of 168359945 is about 12975.3591472452. The cubic root of 168359945 is about 552.1786259845.

The spelling of 168359945 in words is "one hundred sixty-eight million, three hundred fifty-nine thousand, nine hundred forty-five".