1123781380237 has 4 divisors (see below), whose sum is σ = 1151190682236. Its totient is φ = 1096372078240.

The previous prime is 1123781380201. The next prime is 1123781380247. The reversal of 1123781380237 is 7320831873211.

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 14327850601 + 1109453529636 = 119699^2 + 1053306^2 .

It is a cyclic number.

It is not a de Polignac number, because 1123781380237 - 2²⁷ = 1123647162509 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1123781380247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13704650938 + ... + 13704651019.

It is an arithmetic number, because the mean of its divisors is an integer number (287797670559).

Almost surely, 2^{1123781380237} is an apocalyptic number.

It is an amenable number.

1123781380237 is a deficient number, since it is larger than the sum of its proper divisors (27409301999).

1123781380237 is an equidigital number, since it uses as much as digits as its factorization.

1123781380237 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27409301998.

The product of its (nonzero) digits is 338688, while the sum is 46.

The spelling of 1123781380237 in words is "one trillion, one hundred twenty-three billion, seven hundred eighty-one million, three hundred eighty thousand, two hundred thirty-seven".