1123105413 has 4 divisors (see below), whose sum is σ = 1497473888. Its totient is φ = 748736940.

The previous prime is 1123105349. The next prime is 1123105421. The reversal of 1123105413 is 3145013211.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3145013211 = 3 ⋅1048337737.

It is not a de Polignac number, because 1123105413 - 2⁶ = 1123105349 is a prime.

It is a super-2 number, since 2×1123105413² = 2522731537419801138, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1123105413.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1123105463) 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, 187184233 + ... + 187184238.

It is an arithmetic number, because the mean of its divisors is an integer number (374368472).

Almost surely, 2^1123105413 is an apocalyptic number.

It is an amenable number.

1123105413 is a deficient number, since it is larger than the sum of its proper divisors (374368475).

1123105413 is an equidigital number, since it uses as much as digits as its factorization.

1123105413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 374368474.

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 1123105413 is about 33512.7649262188. The cubic root of 1123105413 is about 1039.4577464738.

Adding to 1123105413 its reverse (3145013211), we get a palindrome (4268118624).

The spelling of 1123105413 in words is "one billion, one hundred twenty-three million, one hundred five thousand, four hundred thirteen".