1105819661 has 2 divisors, whose sum is σ = 1105819662. Its totient is φ = 1105819660.

The previous prime is 1105819597. The next prime is 1105819667. The reversal of 1105819661 is 1669185011.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 932080900 + 173738761 = 30530^2 + 13181^2 .

It is a cyclic number.

It is not a de Polignac number, because 1105819661 - 2⁶ = 1105819597 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1105819667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 552909830 + 552909831.

It is an arithmetic number, because the mean of its divisors is an integer number (552909831).

Almost surely, 2^1105819661 is an apocalyptic number.

It is an amenable number.

1105819661 is a deficient number, since it is larger than the sum of its proper divisors (1).

1105819661 is an equidigital number, since it uses as much as digits as its factorization.

1105819661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12960, while the sum is 38.

The square root of 1105819661 is about 33253.8668578558. The cubic root of 1105819661 is about 1034.0973751215.

The spelling of 1105819661 in words is "one billion, one hundred five million, eight hundred nineteen thousand, six hundred sixty-one".