1113543161 has 2 divisors, whose sum is σ = 1113543162. Its totient is φ = 1113543160.

The previous prime is 1113543121. The next prime is 1113543173. The reversal of 1113543161 is 1613453111.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1090320400 + 23222761 = 33020^2 + 4819^2 .

It is a cyclic number.

It is not a de Polignac number, because 1113543161 - 2⁶ = 1113543097 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1113543161.

It is not a weakly prime, because it can be changed into another prime (1113543121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 556771580 + 556771581.

It is an arithmetic number, because the mean of its divisors is an integer number (556771581).

Almost surely, 2^1113543161 is an apocalyptic number.

It is an amenable number.

1113543161 is a deficient number, since it is larger than the sum of its proper divisors (1).

1113543161 is an equidigital number, since it uses as much as digits as its factorization.

1113543161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1080, while the sum is 26.

The square root of 1113543161 is about 33369.7941408094. The cubic root of 1113543161 is about 1036.4993124019.

Adding to 1113543161 its reverse (1613453111), we get a palindrome (2726996272).

The spelling of 1113543161 in words is "one billion, one hundred thirteen million, five hundred forty-three thousand, one hundred sixty-one".