1331358911 has 2 divisors, whose sum is σ = 1331358912. Its totient is φ = 1331358910.

The previous prime is 1331358869. The next prime is 1331358913. The reversal of 1331358911 is 1198531331.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1331358911 is a prime.

Together with 1331358913, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1331358913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 665679455 + 665679456.

It is an arithmetic number, because the mean of its divisors is an integer number (665679456).

Almost surely, 2^1331358911 is an apocalyptic number.

1331358911 is a deficient number, since it is larger than the sum of its proper divisors (1).

1331358911 is an equidigital number, since it uses as much as digits as its factorization.

1331358911 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9720, while the sum is 35.

The square root of 1331358911 is about 36487.7912595432. The cubic root of 1331358911 is about 1100.0988646678.

The spelling of 1331358911 in words is "one billion, three hundred thirty-one million, three hundred fifty-eight thousand, nine hundred eleven".