1113561173 has 2 divisors, whose sum is σ = 1113561174. Its totient is φ = 1113561172.

The previous prime is 1113561157. The next prime is 1113561191. The reversal of 1113561173 is 3711653111.

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., 1092831364 + 20729809 = 33058^2 + 4553^2 .

It is a cyclic number.

It is not a de Polignac number, because 1113561173 - 2⁴ = 1113561157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1113561143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 556780586 + 556780587.

It is an arithmetic number, because the mean of its divisors is an integer number (556780587).

Almost surely, 2^1113561173 is an apocalyptic number.

It is an amenable number.

1113561173 is a deficient number, since it is larger than the sum of its proper divisors (1).

1113561173 is an equidigital number, since it uses as much as digits as its factorization.

1113561173 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1890, while the sum is 29.

The square root of 1113561173 is about 33370.0640245116. The cubic root of 1113561173 is about 1036.5049009669.

The spelling of 1113561173 in words is "one billion, one hundred thirteen million, five hundred sixty-one thousand, one hundred seventy-three".