1031304091 has 2 divisors, whose sum is σ = 1031304092. Its totient is φ = 1031304090.

The previous prime is 1031304089. The next prime is 1031304149. The reversal of 1031304091 is 1904031301.

It is a weak prime.

It is an emirp because it is prime and its reverse (1904031301) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1031304091 - 2¹ = 1031304089 is a prime.

It is a super-2 number, since 2×1031304091² = 2127176256226672562, which contains 22 as substring.

Together with 1031304089, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1031334091) 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, 515652045 + 515652046.

It is an arithmetic number, because the mean of its divisors is an integer number (515652046).

Almost surely, 2^1031304091 is an apocalyptic number.

1031304091 is a deficient number, since it is larger than the sum of its proper divisors (1).

1031304091 is an equidigital number, since it uses as much as digits as its factorization.

1031304091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 324, while the sum is 22.

The square root of 1031304091 is about 32113.9236313472. The cubic root of 1031304091 is about 1010.3276690660.

Adding to 1031304091 its reverse (1904031301), we get a palindrome (2935335392).

The spelling of 1031304091 in words is "one billion, thirty-one million, three hundred four thousand, ninety-one".