1123456679 has 4 divisors (see below), whose sum is σ = 1189542384. Its totient is φ = 1057370976.

The previous prime is 1123456669. The next prime is 1123456687. The reversal of 1123456679 is 9766543211.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1123456679 - 2²⁴ = 1106679463 is a prime.

It is a super-3 number, since 3×1123456679³ (a number of 28 digits) contains 333 as substring.

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 (1123456669) 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, 33042827 + ... + 33042860.

It is an arithmetic number, because the mean of its divisors is an integer number (297385596).

Almost surely, 2^1123456679 is an apocalyptic number.

1123456679 is a deficient number, since it is larger than the sum of its proper divisors (66085705).

1123456679 is an equidigital number, since it uses as much as digits as its factorization.

1123456679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66085704.

The product of its digits is 272160, while the sum is 44.

The square root of 1123456679 is about 33518.0052956616. The cubic root of 1123456679 is about 1039.5661032083.

The spelling of 1123456679 in words is "one billion, one hundred twenty-three million, four hundred fifty-six thousand, six hundred seventy-nine".