1283988655297 has 4 divisors (see below), whose sum is σ = 1301577541060. Its totient is φ = 1266399769536.

The previous prime is 1283988655277. The next prime is 1283988655303. The reversal of 1283988655297 is 7925568893821.

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 530007296256 + 753981359041 = 728016^2 + 868321^2 .

It is a cyclic number.

It is not a de Polignac number, because 1283988655297 - 2¹⁵ = 1283988622529 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (73), and also a Moran number because the ratio is a prime number: 17588885689 = 1283988655297 / (1 + 2 + 8 + 3 + 9 + 8 + 8 + 6 + 5 + 5 + 2 + 9 + 7).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1283988655217) 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, 8794442772 + ... + 8794442917.

It is an arithmetic number, because the mean of its divisors is an integer number (325394385265).

Almost surely, 2^{1283988655297} is an apocalyptic number.

It is an amenable number.

1283988655297 is a deficient number, since it is larger than the sum of its proper divisors (17588885763).

1283988655297 is an equidigital number, since it uses as much as digits as its factorization.

1283988655297 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17588885762.

The product of its digits is 522547200, while the sum is 73.

The spelling of 1283988655297 in words is "one trillion, two hundred eighty-three billion, nine hundred eighty-eight million, six hundred fifty-five thousand, two hundred ninety-seven".