1299998417 has 2 divisors, whose sum is σ = 1299998418. Its totient is φ = 1299998416.

The previous prime is 1299998393. The next prime is 1299998429. The reversal of 1299998417 is 7148999921.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 874030096 + 425968321 = 29564^2 + 20639^2 .

It is a cyclic number.

It is not a de Polignac number, because 1299998417 - 2⁶ = 1299998353 is a prime.

It is not a weakly prime, because it can be changed into another prime (1299998437) 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, 649999208 + 649999209.

It is an arithmetic number, because the mean of its divisors is an integer number (649999209).

Almost surely, 2^1299998417 is an apocalyptic number.

It is an amenable number.

1299998417 is a deficient number, since it is larger than the sum of its proper divisors (1).

1299998417 is an equidigital number, since it uses as much as digits as its factorization.

1299998417 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2939328, while the sum is 59.

The square root of 1299998417 is about 36055.4908023729. The cubic root of 1299998417 is about 1091.3924400674.

The spelling of 1299998417 in words is "one billion, two hundred ninety-nine million, nine hundred ninety-eight thousand, four hundred seventeen".