1171223173 has 2 divisors, whose sum is σ = 1171223174. Its totient is φ = 1171223172.

The previous prime is 1171223167. The next prime is 1171223189. The reversal of 1171223173 is 3713221711.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1170871524 + 351649 = 34218^2 + 593^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1171223173 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1171229173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 585611586 + 585611587.

It is an arithmetic number, because the mean of its divisors is an integer number (585611587).

Almost surely, 2^1171223173 is an apocalyptic number.

It is an amenable number.

1171223173 is a deficient number, since it is larger than the sum of its proper divisors (1).

1171223173 is an equidigital number, since it uses as much as digits as its factorization.

1171223173 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1764, while the sum is 28.

The square root of 1171223173 is about 34223.1379771055. The cubic root of 1171223173 is about 1054.0953208190.

Adding to 1171223173 its reverse (3713221711), we get a palindrome (4884444884).

It can be divided in two parts, 117122 and 3173, that added together give a triangular number (120295 = T₄₉₀).

The spelling of 1171223173 in words is "one billion, one hundred seventy-one million, two hundred twenty-three thousand, one hundred seventy-three".