326620681 has 16 divisors (see below), whose sum is σ = 343664640. Its totient is φ = 310040640.

The previous prime is 326620669. The next prime is 326620691. The reversal of 326620681 is 186026623.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 326620681 - 2¹⁷ = 326489609 is a prime.

It is a super-2 number, since 2×326620681² = 213362138513807522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (326620601) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 482115 + ... + 482791.

It is an arithmetic number, because the mean of its divisors is an integer number (21479040).

Almost surely, 2^326620681 is an apocalyptic number.

326620681 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

326620681 is a deficient number, since it is larger than the sum of its proper divisors (17043959).

326620681 is a wasteful number, since it uses less digits than its factorization.

326620681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 984.

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 326620681 is about 18072.6500823759. The cubic root of 326620681 is about 688.6753842245.

The spelling of 326620681 in words is "three hundred twenty-six million, six hundred twenty thousand, six hundred eighty-one".