1121786617 has 4 divisors (see below), whose sum is σ = 1282041856. Its totient is φ = 961531380.

The previous prime is 1121786593. The next prime is 1121786621. The reversal of 1121786617 is 7166871211.

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: 7166871211 = 4051 ⋅1769161.

It is a cyclic number.

It is not a de Polignac number, because 1121786617 - 2⁷ = 1121786489 is a prime.

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 1121786617.

It is not an unprimeable number, because it can be changed into a prime (1121786717) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80127609 + ... + 80127622.

It is an arithmetic number, because the mean of its divisors is an integer number (320510464).

Almost surely, 2^1121786617 is an apocalyptic number.

It is an amenable number.

1121786617 is a deficient number, since it is larger than the sum of its proper divisors (160255239).

1121786617 is an equidigital number, since it uses as much as digits as its factorization.

1121786617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160255238.

The product of its digits is 28224, while the sum is 40.

The square root of 1121786617 is about 33493.0831217432. The cubic root of 1121786617 is about 1039.0507292828.

The spelling of 1121786617 in words is "one billion, one hundred twenty-one million, seven hundred eighty-six thousand, six hundred seventeen".