1173905113 has 4 divisors (see below), whose sum is σ = 1175356980. Its totient is φ = 1172453248.

The previous prime is 1173905099. The next prime is 1173905129. The reversal of 1173905113 is 3115093711.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1088472064 + 85433049 = 32992^2 + 9243^2 .

It is a cyclic number.

It is not a de Polignac number, because 1173905113 - 2⁵ = 1173905081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1173905813) 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, 724720 + ... + 726337.

It is an arithmetic number, because the mean of its divisors is an integer number (293839245).

Almost surely, 2^1173905113 is an apocalyptic number.

It is an amenable number.

1173905113 is a deficient number, since it is larger than the sum of its proper divisors (1451867).

1173905113 is an equidigital number, since it uses as much as digits as its factorization.

1173905113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1451866.

The product of its (nonzero) digits is 2835, while the sum is 31.

The square root of 1173905113 is about 34262.2987115576. The cubic root of 1173905113 is about 1054.8992852502.

Adding to 1173905113 its reverse (3115093711), we get a palindrome (4288998824).

The spelling of 1173905113 in words is "one billion, one hundred seventy-three million, nine hundred five thousand, one hundred thirteen".