1116173521 has 2 divisors, whose sum is σ = 1116173522. Its totient is φ = 1116173520.

The previous prime is 1116173519. The next prime is 1116173543. The reversal of 1116173521 is 1253716111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 735494400 + 380679121 = 27120^2 + 19511^2 .

It is a cyclic number.

It is not a de Polignac number, because 1116173521 - 2¹ = 1116173519 is a prime.

Together with 1116173519, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1116173521.

It is not a weakly prime, because it can be changed into another prime (1116173501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 558086760 + 558086761.

It is an arithmetic number, because the mean of its divisors is an integer number (558086761).

Almost surely, 2^1116173521 is an apocalyptic number.

It is an amenable number.

1116173521 is a deficient number, since it is larger than the sum of its proper divisors (1).

1116173521 is an equidigital number, since it uses as much as digits as its factorization.

1116173521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1260, while the sum is 28.

The square root of 1116173521 is about 33409.1831836697. The cubic root of 1116173521 is about 1037.3147941724.

Adding to 1116173521 its reverse (1253716111), we get a palindrome (2369889632).

The spelling of 1116173521 in words is "one billion, one hundred sixteen million, one hundred seventy-three thousand, five hundred twenty-one".