1123685213 has 8 divisors (see below), whose sum is σ = 1351801920. Its totient is φ = 912466080.

The previous prime is 1123685201. The next prime is 1123685219. The reversal of 1123685213 is 3125863211.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1123685213 - 2¹⁸ = 1123423069 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1123685213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1123685219) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4224248 + ... + 4224513.

It is an arithmetic number, because the mean of its divisors is an integer number (168975240).

Almost surely, 2^1123685213 is an apocalyptic number.

It is an amenable number.

1123685213 is a deficient number, since it is larger than the sum of its proper divisors (228116707).

1123685213 is an equidigital number, since it uses as much as digits as its factorization.

1123685213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8448787.

The product of its digits is 8640, while the sum is 32.

The square root of 1123685213 is about 33521.4142452254. The cubic root of 1123685213 is about 1039.6365880779.

The spelling of 1123685213 in words is "one billion, one hundred twenty-three million, six hundred eighty-five thousand, two hundred thirteen".