1068235661 has 2 divisors, whose sum is σ = 1068235662. Its totient is φ = 1068235660.

The previous prime is 1068235657. The next prime is 1068235673. The reversal of 1068235661 is 1665328601.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 861422500 + 206813161 = 29350^2 + 14381^2 .

It is an emirp because it is prime and its reverse (1665328601) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1068235661 - 2² = 1068235657 is a prime.

It is a super-2 number, since 2×1068235661² = 2282254854864213842, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1068235631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 534117830 + 534117831.

It is an arithmetic number, because the mean of its divisors is an integer number (534117831).

Almost surely, 2^1068235661 is an apocalyptic number.

It is an amenable number.

1068235661 is a deficient number, since it is larger than the sum of its proper divisors (1).

1068235661 is an equidigital number, since it uses as much as digits as its factorization.

1068235661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 51840, while the sum is 38.

The square root of 1068235661 is about 32683.8746326074. The cubic root of 1068235661 is about 1022.2466374083.

The spelling of 1068235661 in words is "one billion, sixty-eight million, two hundred thirty-five thousand, six hundred sixty-one".