331648169 has 4 divisors (see below), whose sum is σ = 331751940. Its totient is φ = 331544400.

The previous prime is 331648153. The next prime is 331648193. The reversal of 331648169 is 961846133.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 961846133 = 1307 ⋅735919.

It can be written as a sum of positive squares in 2 ways, for example, as 191462569 + 140185600 = 13837^2 + 11840^2 .

It is a cyclic number.

It is not a de Polignac number, because 331648169 - 2⁴ = 331648153 is a prime.

It is a super-2 number, since 2×331648169² = 219981016002105122, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (331648129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46934 + ... + 53535.

It is an arithmetic number, because the mean of its divisors is an integer number (82937985).

Almost surely, 2^331648169 is an apocalyptic number.

It is an amenable number.

331648169 is a deficient number, since it is larger than the sum of its proper divisors (103771).

331648169 is a wasteful number, since it uses less digits than its factorization.

331648169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103770.

The product of its digits is 93312, while the sum is 41.

The square root of 331648169 is about 18211.2099817667. The cubic root of 331648169 is about 692.1908721195.

The spelling of 331648169 in words is "three hundred thirty-one million, six hundred forty-eight thousand, one hundred sixty-nine".