1331326817 has 8 divisors (see below), whose sum is σ = 1340469000. Its totient is φ = 1322214400.

The previous prime is 1331326813. The next prime is 1331326823. The reversal of 1331326817 is 7186231331.

It can be written as a sum of positive squares in 4 ways, for example, as 549621136 + 781705681 = 23444^2 + 27959^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1331326817 - 2² = 1331326813 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1331326813) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 86309 + ... + 100557.

It is an arithmetic number, because the mean of its divisors is an integer number (167558625).

Almost surely, 2^1331326817 is an apocalyptic number.

It is an amenable number.

1331326817 is a deficient number, since it is larger than the sum of its proper divisors (9142183).

1331326817 is a wasteful number, since it uses less digits than its factorization.

1331326817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14883.

The product of its digits is 18144, while the sum is 35.

The square root of 1331326817 is about 36487.3514659532. The cubic root of 1331326817 is about 1100.0900248635.

The spelling of 1331326817 in words is "one billion, three hundred thirty-one million, three hundred twenty-six thousand, eight hundred seventeen".