1121379169 has 3 divisors (see below), whose sum is σ = 1121412657.
Its totient is φ = 1121345682.
The previous prime is 1121379131. The next prime is 1121379179. The reversal of 1121379169 is 9619731211.
The square root of 1121379169 is 33487.
It is a perfect power (a square), and thus also a powerful number.
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 not a de Polignac number, because 1121379169 - 213 = 1121370977 is a prime.
It is a super-2 number, since 2×11213791692 = 2514982481334261122, which contains 22 as substring.
It is a Duffinian number.
It is not an unprimeable number, because it can be changed into a prime (1121379179) by changing a digit.
It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 16744 + ... + 50230.
It is an arithmetic number, because the mean of its divisors is an integer number (373804219).
Almost surely, 21121379169 is an apocalyptic number.
1121379169 is the 33487-th square number.
1121379169 is the 16744-th centered octagonal number.
It is an amenable number.
1121379169 is a deficient number, since it is larger than the sum of its proper divisors (33488).
1121379169 is an frugal number, since it uses more digits than its factorization.
1121379169 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 66974 (or 33487 counting only the distinct ones).
The product of its digits is 20412, while the sum is 40.
The cubic root of 1121379169 is about 1038.9249149785.
The spelling of 1121379169 in words is "one billion, one hundred twenty-one million, three hundred seventy-nine thousand, one hundred sixty-nine".