1331132697 has 20 divisors (see below), whose sum is σ = 1990471780. Its totient is φ = 886533984.

The previous prime is 1331132681. The next prime is 1331132701. The reversal of 1331132697 is 7962311331.

1331132697 is a `hidden beast` number, since 13 + 311 + 326 + 9 + 7 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 240746256 + 1090386441 = 15516^2 + 33021^2 .

It is not a de Polignac number, because 1331132697 - 2⁴ = 1331132681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1331137697) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 78903 + ... + 94275.

It is an arithmetic number, because the mean of its divisors is an integer number (99523589).

Almost surely, 2^1331132697 is an apocalyptic number.

It is an amenable number.

1331132697 is a deficient number, since it is larger than the sum of its proper divisors (659339083).

1331132697 is a wasteful number, since it uses less digits than its factorization.

1331132697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16454 (or 16445 counting only the distinct ones).

The product of its digits is 20412, while the sum is 36.

The square root of 1331132697 is about 36484.6912690789. The cubic root of 1331132697 is about 1100.0365544326.

The spelling of 1331132697 in words is "one billion, three hundred thirty-one million, one hundred thirty-two thousand, six hundred ninety-seven".