1299068731 has 2 divisors, whose sum is σ = 1299068732. Its totient is φ = 1299068730.

The previous prime is 1299068713. The next prime is 1299068747. The reversal of 1299068731 is 1378609921.

It is a happy number.

Together with previous prime (1299068713) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1299068731 - 2²¹ = 1296971579 is a prime.

It is a super-2 number, since 2×1299068731² = 3375159135723900722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1299068791) 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, 649534365 + 649534366.

It is an arithmetic number, because the mean of its divisors is an integer number (649534366).

Almost surely, 2^1299068731 is an apocalyptic number.

1299068731 is a deficient number, since it is larger than the sum of its proper divisors (1).

1299068731 is an equidigital number, since it uses as much as digits as its factorization.

1299068731 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 163296, while the sum is 46.

The square root of 1299068731 is about 36042.5960635468. The cubic root of 1299068731 is about 1091.1322104576.

The spelling of 1299068731 in words is "one billion, two hundred ninety-nine million, sixty-eight thousand, seven hundred thirty-one".