1306996531 has 2 divisors, whose sum is σ = 1306996532. Its totient is φ = 1306996530.

The previous prime is 1306996513. The next prime is 1306996573. The reversal of 1306996531 is 1356996031.

Together with previous prime (1306996513) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1306996531 is a prime.

It is a super-2 number, since 2×1306996531² = 3416479864092067922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1306996501) 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, 653498265 + 653498266.

It is an arithmetic number, because the mean of its divisors is an integer number (653498266).

Almost surely, 2^1306996531 is an apocalyptic number.

1306996531 is a deficient number, since it is larger than the sum of its proper divisors (1).

1306996531 is an equidigital number, since it uses as much as digits as its factorization.

1306996531 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 131220, while the sum is 43.

The square root of 1306996531 is about 36152.4069876405. The cubic root of 1306996531 is about 1093.3473205400.

The spelling of 1306996531 in words is "one billion, three hundred six million, nine hundred ninety-six thousand, five hundred thirty-one".