1298139319 has 2 divisors, whose sum is σ = 1298139320. Its totient is φ = 1298139318.

The previous prime is 1298139307. The next prime is 1298139361. The reversal of 1298139319 is 9139318921.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1298139319 - 2¹¹ = 1298137271 is a prime.

It is a super-2 number, since 2×1298139319² = 3370331383067567522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1298839319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 649069659 + 649069660.

It is an arithmetic number, because the mean of its divisors is an integer number (649069660).

Almost surely, 2^1298139319 is an apocalyptic number.

1298139319 is a deficient number, since it is larger than the sum of its proper divisors (1).

1298139319 is an equidigital number, since it uses as much as digits as its factorization.

1298139319 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 104976, while the sum is 46.

The square root of 1298139319 is about 36029.7005122163. The cubic root of 1298139319 is about 1090.8719334122.

The spelling of 1298139319 in words is "one billion, two hundred ninety-eight million, one hundred thirty-nine thousand, three hundred nineteen".