1299161099 has 2 divisors, whose sum is σ = 1299161100. Its totient is φ = 1299161098.

The previous prime is 1299161093. The next prime is 1299161117. The reversal of 1299161099 is 9901619921.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (9901619921) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1299161099 - 2¹⁶ = 1299095563 is a prime.

It is a super-2 number, since 2×1299161099² = 3375639122309775602, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1299161093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 649580549 + 649580550.

It is an arithmetic number, because the mean of its divisors is an integer number (649580550).

Almost surely, 2^1299161099 is an apocalyptic number.

1299161099 is a deficient number, since it is larger than the sum of its proper divisors (1).

1299161099 is an equidigital number, since it uses as much as digits as its factorization.

1299161099 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 78732, while the sum is 47.

The square root of 1299161099 is about 36043.8774135081. The cubic root of 1299161099 is about 1091.1580708577.

The spelling of 1299161099 in words is "one billion, two hundred ninety-nine million, one hundred sixty-one thousand, ninety-nine".