1123345679 has 4 divisors (see below), whose sum is σ = 1123433976. Its totient is φ = 1123257384.

The previous prime is 1123345673. The next prime is 1123345687. The reversal of 1123345679 is 9765433211.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1123345679 - 2¹⁶ = 1123280143 is a prime.

It is a Duffinian number.

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1123345673) 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, 21029 + ... + 51854.

It is an arithmetic number, because the mean of its divisors is an integer number (280858494).

Almost surely, 2^1123345679 is an apocalyptic number.

1123345679 is a deficient number, since it is larger than the sum of its proper divisors (88297).

1123345679 is an equidigital number, since it uses as much as digits as its factorization.

1123345679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88296.

The product of its digits is 136080, while the sum is 41.

The square root of 1123345679 is about 33516.3494283014. The cubic root of 1123345679 is about 1039.5318649387.

The spelling of 1123345679 in words is "one billion, one hundred twenty-three million, three hundred forty-five thousand, six hundred seventy-nine".