99843295661 has 2 divisors, whose sum is σ = 99843295662. Its totient is φ = 99843295660.

The previous prime is 99843295603. The next prime is 99843295693. The reversal of 99843295661 is 16659234899.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 73178365225 + 26664930436 = 270515^2 + 163294^2 .

It is a cyclic number.

It is not a de Polignac number, because 99843295661 - 2⁶ = 99843295597 is a prime.

It is a super-2 number, since 2×99843295661² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 99843295594 and 99843295603.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99843295061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49921647830 + 49921647831.

It is an arithmetic number, because the mean of its divisors is an integer number (49921647831).

Almost surely, 2^99843295661 is an apocalyptic number.

It is an amenable number.

99843295661 is a deficient number, since it is larger than the sum of its proper divisors (1).

99843295661 is an equidigital number, since it uses as much as digits as its factorization.

99843295661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25194240, while the sum is 62.

The spelling of 99843295661 in words is "ninety-nine billion, eight hundred forty-three million, two hundred ninety-five thousand, six hundred sixty-one".