1299473869 has 2 divisors, whose sum is σ = 1299473870. Its totient is φ = 1299473868.

The previous prime is 1299473839. The next prime is 1299473881. The reversal of 1299473869 is 9683749921.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1118032969 + 181440900 = 33437^2 + 13470^2 .

It is an emirp because it is prime and its reverse (9683749921) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1299473869 - 2¹⁹ = 1298949581 is a prime.

It is a super-2 number, since 2×1299473869² = 3377264672427658322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1299473809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 649736934 + 649736935.

It is an arithmetic number, because the mean of its divisors is an integer number (649736935).

Almost surely, 2^1299473869 is an apocalyptic number.

It is an amenable number.

1299473869 is a deficient number, since it is larger than the sum of its proper divisors (1).

1299473869 is an equidigital number, since it uses as much as digits as its factorization.

1299473869 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5878656, while the sum is 58.

The square root of 1299473869 is about 36048.2158920521. The cubic root of 1299473869 is about 1091.2456284172.

The spelling of 1299473869 in words is "one billion, two hundred ninety-nine million, four hundred seventy-three thousand, eight hundred sixty-nine".