1331697337 has 2 divisors, whose sum is σ = 1331697338. Its totient is φ = 1331697336.

The previous prime is 1331697331. The next prime is 1331697359. The reversal of 1331697337 is 7337961331.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 674492841 + 657204496 = 25971^2 + 25636^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1331697337 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1331697293 and 1331697302.

It is not a weakly prime, because it can be changed into another prime (1331697331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 665848668 + 665848669.

It is an arithmetic number, because the mean of its divisors is an integer number (665848669).

Almost surely, 2^1331697337 is an apocalyptic number.

It is an amenable number.

1331697337 is a deficient number, since it is larger than the sum of its proper divisors (1).

1331697337 is an equidigital number, since it uses as much as digits as its factorization.

1331697337 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 214326, while the sum is 43.

The square root of 1331697337 is about 36492.4284886605. The cubic root of 1331697337 is about 1100.1920703175.

The spelling of 1331697337 in words is "one billion, three hundred thirty-one million, six hundred ninety-seven thousand, three hundred thirty-seven".