1288717330493 has 4 divisors (see below), whose sum is σ = 1290950809980. Its totient is φ = 1286483851008.

The previous prime is 1288717330489. The next prime is 1288717330513. The reversal of 1288717330493 is 3940337178821.

It is a happy number.

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 1270857146329 + 17860184164 = 1127323^2 + 133642^2 .

It is a cyclic number.

It is not a de Polignac number, because 1288717330493 - 2² = 1288717330489 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1288717320493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1116738878 + ... + 1116740031.

It is an arithmetic number, because the mean of its divisors is an integer number (322737702495).

Almost surely, 2^{1288717330493} is an apocalyptic number.

It is an amenable number.

1288717330493 is a deficient number, since it is larger than the sum of its proper divisors (2233479487).

1288717330493 is an equidigital number, since it uses as much as digits as its factorization.

1288717330493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2233479486.

The product of its (nonzero) digits is 6096384, while the sum is 56.

The spelling of 1288717330493 in words is "one trillion, two hundred eighty-eight billion, seven hundred seventeen million, three hundred thirty thousand, four hundred ninety-three".