1031320117 has 2 divisors, whose sum is σ = 1031320118. Its totient is φ = 1031320116.

The previous prime is 1031320111. The next prime is 1031320139. The reversal of 1031320117 is 7110231301.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 880546276 + 150773841 = 29674^2 + 12279^2 .

It is a cyclic number.

It is not a de Polignac number, because 1031320117 - 2¹⁵ = 1031287349 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1031320094 and 1031320103.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1031320111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 515660058 + 515660059.

It is an arithmetic number, because the mean of its divisors is an integer number (515660059).

Almost surely, 2^1031320117 is an apocalyptic number.

It is an amenable number.

1031320117 is a deficient number, since it is larger than the sum of its proper divisors (1).

1031320117 is an equidigital number, since it uses as much as digits as its factorization.

1031320117 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 126, while the sum is 19.

The square root of 1031320117 is about 32114.1731483157. The cubic root of 1031320117 is about 1010.3329023842.

Adding to 1031320117 its reverse (7110231301), we get a palindrome (8141551418).

The spelling of 1031320117 in words is "one billion, thirty-one million, three hundred twenty thousand, one hundred seventeen".