1231789717413 has 12 divisors (see below), whose sum is σ = 1840605325260. Its totient is φ = 792876139776.

The previous prime is 1231789717393. The next prime is 1231789717423. The reversal of 1231789717413 is 3147179871321.

1231789717413 is a `hidden beast` number, since 123 + 1 + 7 + 8 + 97 + 17 + 413 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 217261328769 + 1014528388644 = 466113^2 + 1007238^2 .

It is not a de Polignac number, because 1231789717413 - 2²² = 1231785523109 is a prime.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 1231789717413.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231789717423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2359750156 + ... + 2359750677.

It is an arithmetic number, because the mean of its divisors is an integer number (153383777105).

Almost surely, 2^{1231789717413} is an apocalyptic number.

It is an amenable number.

1231789717413 is a deficient number, since it is larger than the sum of its proper divisors (608815607847).

1231789717413 is a wasteful number, since it uses less digits than its factorization.

1231789717413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4719500868 (or 4719500865 counting only the distinct ones).

The product of its digits is 1778112, while the sum is 54.

The spelling of 1231789717413 in words is "one trillion, two hundred thirty-one billion, seven hundred eighty-nine million, seven hundred seventeen thousand, four hundred thirteen".