1300000831 has 2 divisors, whose sum is σ = 1300000832. Its totient is φ = 1300000830.

The previous prime is 1300000783. The next prime is 1300000909. The reversal of 1300000831 is 1380000031.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1300000831 - 2¹⁹ = 1299476543 is a prime.

It is a super-2 number, since 2×1300000831² = 3380004321201381122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1300000231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 650000415 + 650000416.

It is an arithmetic number, because the mean of its divisors is an integer number (650000416).

Almost surely, 2^1300000831 is an apocalyptic number.

1300000831 is a deficient number, since it is larger than the sum of its proper divisors (1).

1300000831 is an equidigital number, since it uses as much as digits as its factorization.

1300000831 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 1300000831 is about 36055.5242785346. The cubic root of 1300000831 is about 1091.3931156117.

Adding to 1300000831 its reverse (1380000031), we get a palindrome (2680000862).

The spelling of 1300000831 in words is "one billion, three hundred million, eight hundred thirty-one", and thus it is an aban number.