1243363123469 has 4 divisors (see below), whose sum is σ = 1252438766844. Its totient is φ = 1234287480096.

The previous prime is 1243363123459. The next prime is 1243363123487. The reversal of 1243363123469 is 9643213633421.

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 1005377209225 + 237985914244 = 1002685^2 + 487838^2 .

It is a cyclic number.

It is not a de Polignac number, because 1243363123469 - 2⁸ = 1243363123213 is a prime.

It is a super-2 number, since 2×1243363123469² (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 (1243363123459) 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, 4537821482 + ... + 4537821755.

It is an arithmetic number, because the mean of its divisors is an integer number (313109691711).

Almost surely, 2^{1243363123469} is an apocalyptic number.

It is an amenable number.

1243363123469 is a deficient number, since it is larger than the sum of its proper divisors (9075643375).

1243363123469 is an equidigital number, since it uses as much as digits as its factorization.

1243363123469 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9075643374.

The product of its digits is 1679616, while the sum is 47.

The spelling of 1243363123469 in words is "one trillion, two hundred forty-three billion, three hundred sixty-three million, one hundred twenty-three thousand, four hundred sixty-nine".