326005993 has 2 divisors, whose sum is σ = 326005994. Its totient is φ = 326005992.

The previous prime is 326005969. The next prime is 326005997. The reversal of 326005993 is 399500623.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 320660649 + 5345344 = 17907^2 + 2312^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-326005993 is a prime.

It is a super-3 number, since 3×326005993³ (a number of 27 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (326005997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 163002996 + 163002997.

It is an arithmetic number, because the mean of its divisors is an integer number (163002997).

Almost surely, 2^326005993 is an apocalyptic number.

It is an amenable number.

326005993 is a deficient number, since it is larger than the sum of its proper divisors (1).

326005993 is an equidigital number, since it uses as much as digits as its factorization.

326005993 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 43740, while the sum is 37.

The square root of 326005993 is about 18055.6360452907. The cubic root of 326005993 is about 688.2430924203.

The spelling of 326005993 in words is "three hundred twenty-six million, five thousand, nine hundred ninety-three".