1109641061 has 2 divisors, whose sum is σ = 1109641062. Its totient is φ = 1109641060.

The previous prime is 1109641009. The next prime is 1109641081. The reversal of 1109641061 is 1601469011.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1081752100 + 27888961 = 32890^2 + 5281^2 .

It is a cyclic number.

It is not a de Polignac number, because 1109641061 - 2⁶ = 1109640997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1109641081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 554820530 + 554820531.

It is an arithmetic number, because the mean of its divisors is an integer number (554820531).

Almost surely, 2^1109641061 is an apocalyptic number.

It is an amenable number.

1109641061 is a deficient number, since it is larger than the sum of its proper divisors (1).

1109641061 is an equidigital number, since it uses as much as digits as its factorization.

1109641061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 29.

The square root of 1109641061 is about 33311.2752833031. The cubic root of 1109641061 is about 1035.2871883077.

The spelling of 1109641061 in words is "one billion, one hundred nine million, six hundred forty-one thousand, sixty-one".