1123649623 has 4 divisors (see below), whose sum is σ = 1123720528. Its totient is φ = 1123578720.

The previous prime is 1123649617. The next prime is 1123649651. The reversal of 1123649623 is 3269463211.

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 a de Polignac number, because none of the positive numbers 2^k-1123649623 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1123649123) 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, 415 + ... + 47407.

It is an arithmetic number, because the mean of its divisors is an integer number (280930132).

Almost surely, 2^1123649623 is an apocalyptic number.

1123649623 is a deficient number, since it is larger than the sum of its proper divisors (70905).

1123649623 is an equidigital number, since it uses as much as digits as its factorization.

1123649623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70904.

The product of its digits is 46656, while the sum is 37.

The square root of 1123649623 is about 33520.8833863310. The cubic root of 1123649623 is about 1039.6256119740.

The spelling of 1123649623 in words is "one billion, one hundred twenty-three million, six hundred forty-nine thousand, six hundred twenty-three".