1298193789149 has 4 divisors (see below), whose sum is σ = 1298198195580. Its totient is φ = 1298189382720.

The previous prime is 1298193789131. The next prime is 1298193789181. The reversal of 1298193789149 is 9419873918921.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 994493601049 + 303700188100 = 997243^2 + 551090^2 .

It is a cyclic number.

It is not a de Polignac number, because 1298193789149 - 2⁸ = 1298193788893 is a prime.

It is a super-2 number, since 2×1298193789149² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1298193789049) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1726982 + ... + 2361959.

It is an arithmetic number, because the mean of its divisors is an integer number (324549548895).

Almost surely, 2^{1298193789149} is an apocalyptic number.

It is an amenable number.

1298193789149 is a deficient number, since it is larger than the sum of its proper divisors (4406431).

1298193789149 is an equidigital number, since it uses as much as digits as its factorization.

1298193789149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4406430.

The product of its digits is 70543872, while the sum is 71.

The spelling of 1298193789149 in words is "one trillion, two hundred ninety-eight billion, one hundred ninety-three million, seven hundred eighty-nine thousand, one hundred forty-nine".