326656513 has 4 divisors (see below), whose sum is σ = 345871620. Its totient is φ = 307441408.

The previous prime is 326656507. The next prime is 326656529. The reversal of 326656513 is 315656623.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 315656623 = 23 ⋅13724201.

It can be written as a sum of positive squares in 2 ways, for example, as 291999744 + 34656769 = 17088^2 + 5887^2 .

It is a cyclic number.

It is not a de Polignac number, because 326656513 - 2⁵ = 326656481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (326666513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9607528 + ... + 9607561.

It is an arithmetic number, because the mean of its divisors is an integer number (86467905).

Almost surely, 2^326656513 is an apocalyptic number.

It is an amenable number.

326656513 is a deficient number, since it is larger than the sum of its proper divisors (19215107).

326656513 is a wasteful number, since it uses less digits than its factorization.

326656513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19215106.

The product of its digits is 97200, while the sum is 37.

The square root of 326656513 is about 18073.6413873906. The cubic root of 326656513 is about 688.7005670695.

The spelling of 326656513 in words is "three hundred twenty-six million, six hundred fifty-six thousand, five hundred thirteen".