1306664831 has 2 divisors, whose sum is σ = 1306664832. Its totient is φ = 1306664830.

The previous prime is 1306664791. The next prime is 1306664873. The reversal of 1306664831 is 1384666031.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1306664831 - 2¹⁰ = 1306663807 is a prime.

It is a super-2 number, since 2×1306664831² = 3414745961144517122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1306666831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 653332415 + 653332416.

It is an arithmetic number, because the mean of its divisors is an integer number (653332416).

Almost surely, 2^1306664831 is an apocalyptic number.

1306664831 is a deficient number, since it is larger than the sum of its proper divisors (1).

1306664831 is an equidigital number, since it uses as much as digits as its factorization.

1306664831 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 62208, while the sum is 38.

The square root of 1306664831 is about 36147.8191734992. The cubic root of 1306664831 is about 1093.2548199143.

The spelling of 1306664831 in words is "one billion, three hundred six million, six hundred sixty-four thousand, eight hundred thirty-one".