1118456173 has 2 divisors, whose sum is σ = 1118456174. Its totient is φ = 1118456172.

The previous prime is 1118456149. The next prime is 1118456233. The reversal of 1118456173 is 3716548111.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 838797444 + 279658729 = 28962^2 + 16723^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1118456173 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1118454173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 559228086 + 559228087.

It is an arithmetic number, because the mean of its divisors is an integer number (559228087).

Almost surely, 2^1118456173 is an apocalyptic number.

It is an amenable number.

1118456173 is a deficient number, since it is larger than the sum of its proper divisors (1).

1118456173 is an equidigital number, since it uses as much as digits as its factorization.

1118456173 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20160, while the sum is 37.

The square root of 1118456173 is about 33443.3277799922. The cubic root of 1118456173 is about 1038.0214394959.

The spelling of 1118456173 in words is "one billion, one hundred eighteen million, four hundred fifty-six thousand, one hundred seventy-three".