1123688078 has 4 divisors (see below), whose sum is σ = 1685532120. Its totient is φ = 561844038.

The previous prime is 1123688077. The next prime is 1123688081. The reversal of 1123688078 is 8708863211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8708863211 = 67 ⋅129983033.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1123688077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280922018 + ... + 280922021.

It is an arithmetic number, because the mean of its divisors is an integer number (421383030).

Almost surely, 2^1123688078 is an apocalyptic number.

1123688078 is a deficient number, since it is larger than the sum of its proper divisors (561844042).

1123688078 is an equidigital number, since it uses as much as digits as its factorization.

1123688078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 561844041.

The product of its (nonzero) digits is 129024, while the sum is 44.

The square root of 1123688078 is about 33521.4569790754. The cubic root of 1123688078 is about 1039.6374716457.

The spelling of 1123688078 in words is "one billion, one hundred twenty-three million, six hundred eighty-eight thousand, seventy-eight".