1123613031 has 4 divisors (see below), whose sum is σ = 1498150712. Its totient is φ = 749075352.

The previous prime is 1123613027. The next prime is 1123613039. The reversal of 1123613031 is 1303163211.

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

It is not a de Polignac number, because 1123613031 - 2² = 1123613027 is a prime.

It is a super-2 number, since 2×1123613031² = 2525012486866013922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1123612989 and 1123613007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1123613039) 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, 187268836 + ... + 187268841.

It is an arithmetic number, because the mean of its divisors is an integer number (374537678).

Almost surely, 2^1123613031 is an apocalyptic number.

1123613031 is a deficient number, since it is larger than the sum of its proper divisors (374537681).

1123613031 is an equidigital number, since it uses as much as digits as its factorization.

1123613031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 374537680.

The product of its (nonzero) digits is 324, while the sum is 21.

The square root of 1123613031 is about 33520.3375728825. The cubic root of 1123613031 is about 1039.6143266076.

Adding to 1123613031 its reverse (1303163211), we get a palindrome (2426776242).

The spelling of 1123613031 in words is "one billion, one hundred twenty-three million, six hundred thirteen thousand, thirty-one".