1331358947 has 2 divisors, whose sum is σ = 1331358948. Its totient is φ = 1331358946.

The previous prime is 1331358913. The next prime is 1331359009. The reversal of 1331358947 is 7498531331.

It is a weak prime.

It is an emirp because it is prime and its reverse (7498531331) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1331358947 - 2¹⁸ = 1331096803 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1331358898 and 1331358907.

It is not a weakly prime, because it can be changed into another prime (1331358547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 665679473 + 665679474.

It is an arithmetic number, because the mean of its divisors is an integer number (665679474).

Almost surely, 2^1331358947 is an apocalyptic number.

1331358947 is a deficient number, since it is larger than the sum of its proper divisors (1).

1331358947 is an equidigital number, since it uses as much as digits as its factorization.

1331358947 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 272160, while the sum is 44.

The square root of 1331358947 is about 36487.7917528589. The cubic root of 1331358947 is about 1100.0988745834.

The spelling of 1331358947 in words is "one billion, three hundred thirty-one million, three hundred fifty-eight thousand, nine hundred forty-seven".