1123279917 has 8 divisors (see below), whose sum is σ = 1497936096. Its totient is φ = 748738512.

The previous prime is 1123279903. The next prime is 1123279961. The reversal of 1123279917 is 7199723211.

It is a happy number.

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

It is not a de Polignac number, because 1123279917 - 2²⁸ = 854844461 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1123279987) 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, 2418 + ... + 47459.

It is an arithmetic number, because the mean of its divisors is an integer number (187242012).

Almost surely, 2^1123279917 is an apocalyptic number.

It is an amenable number.

1123279917 is a deficient number, since it is larger than the sum of its proper divisors (374656179).

1123279917 is an equidigital number, since it uses as much as digits as its factorization.

1123279917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57387.

The product of its digits is 47628, while the sum is 42.

The square root of 1123279917 is about 33515.3683703462. The cubic root of 1123279917 is about 1039.5115793965.

The spelling of 1123279917 in words is "one billion, one hundred twenty-three million, two hundred seventy-nine thousand, nine hundred seventeen".