1127683561 has 3 divisors (see below), whose sum is σ = 1127717143. Its totient is φ = 1127649980.

The previous prime is 1127683547. The next prime is 1127683651. The reversal of 1127683561 is 1653867211.

It is a happy number.

The square root of 1127683561 is 33581.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1653867211 = 311 ⋅5317901.

It can be written as a sum of positive squares in only one way, i.e., 5433561 + 1122250000 = 2331^2 + 33500^2 .

It is not a de Polignac number, because 1127683561 - 2⁷ = 1127683433 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1127683541) 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, 16791 + ... + 50371.

Almost surely, 2^1127683561 is an apocalyptic number.

1127683561 is the 33581-st square number.

1127683561 is the 16791-st centered octagonal number.

It is an amenable number.

1127683561 is a deficient number, since it is larger than the sum of its proper divisors (33582).

1127683561 is an frugal number, since it uses more digits than its factorization.

1127683561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67162 (or 33581 counting only the distinct ones).

The product of its digits is 60480, while the sum is 40.

The cubic root of 1127683561 is about 1040.8682225275.

The spelling of 1127683561 in words is "one billion, one hundred twenty-seven million, six hundred eighty-three thousand, five hundred sixty-one".