1244935998289 has 3 divisors (see below), whose sum is σ = 1244937114057. Its totient is φ = 1244934882522.

The previous prime is 1244935998233. The next prime is 1244935998307. The reversal of 1244935998289 is 9828995394421.

The square root of 1244935998289 is 1115767.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 1244935998289 - 2⁷ = 1244935998161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1244935990289) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 557884 + ... + 1673650.

It is an arithmetic number, because the mean of its divisors is an integer number (414979038019).

Almost surely, 2^{1244935998289} is an apocalyptic number.

1244935998289 is the 1115767-th square number.

1244935998289 is the 557884-th centered octagonal number.

It is an amenable number.

1244935998289 is a deficient number, since it is larger than the sum of its proper divisors (1115768).

1244935998289 is an frugal number, since it uses more digits than its factorization.

1244935998289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2231534 (or 1115767 counting only the distinct ones).

The product of its digits is 403107840, while the sum is 73.

The spelling of 1244935998289 in words is "one trillion, two hundred forty-four billion, nine hundred thirty-five million, nine hundred ninety-eight thousand, two hundred eighty-nine".