326667997 has 4 divisors (see below), whose sum is σ = 330603840. Its totient is φ = 322732156.

The previous prime is 326667949. The next prime is 326668009. The reversal of 326667997 is 799766623.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 799766623 = 41 ⋅19506503.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-326667997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (326667697) 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 in 3 ways as a sum of consecutive naturals, for example, 1967797 + ... + 1967962.

It is an arithmetic number, because the mean of its divisors is an integer number (82650960).

Almost surely, 2^326667997 is an apocalyptic number.

It is an amenable number.

326667997 is a deficient number, since it is larger than the sum of its proper divisors (3935843).

326667997 is an equidigital number, since it uses as much as digits as its factorization.

326667997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3935842.

The product of its digits is 5143824, while the sum is 55.

The square root of 326667997 is about 18073.9590848270. The cubic root of 326667997 is about 688.7086376721.

The spelling of 326667997 in words is "three hundred twenty-six million, six hundred sixty-seven thousand, nine hundred ninety-seven".