326640037 has 2 divisors, whose sum is σ = 326640038. Its totient is φ = 326640036.

The previous prime is 326640011. The next prime is 326640047. The reversal of 326640037 is 730046623.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 192404641 + 134235396 = 13871^2 + 11586^2 .

It is a cyclic number.

It is not a de Polignac number, because 326640037 - 2²⁷ = 192422309 is a prime.

It is a super-2 number, since 2×326640037² = 213387427542722738, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 326639990 and 326640008.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (326640047) 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 as a sum of consecutive naturals, namely, 163320018 + 163320019.

It is an arithmetic number, because the mean of its divisors is an integer number (163320019).

Almost surely, 2^326640037 is an apocalyptic number.

It is an amenable number.

326640037 is a deficient number, since it is larger than the sum of its proper divisors (1).

326640037 is an equidigital number, since it uses as much as digits as its factorization.

326640037 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18144, while the sum is 31.

The square root of 326640037 is about 18073.1855797477. The cubic root of 326640037 is about 688.6889879124.

The spelling of 326640037 in words is "three hundred twenty-six million, six hundred forty thousand, thirty-seven".