9090691693 has 2 divisors, whose sum is σ = 9090691694. Its totient is φ = 9090691692.

The previous prime is 9090691657. The next prime is 9090691697. The reversal of 9090691693 is 3961960909.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5706593764 + 3384097929 = 75542^2 + 58173^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9090691693 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 9090691693.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9090691697) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4545345846 + 4545345847.

It is an arithmetic number, because the mean of its divisors is an integer number (4545345847).

Almost surely, 2^9090691693 is an apocalyptic number.

It is an amenable number.

9090691693 is a deficient number, since it is larger than the sum of its proper divisors (1).

9090691693 is an equidigital number, since it uses as much as digits as its factorization.

9090691693 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 708588, while the sum is 52.

The square root of 9090691693 is about 95345.1188734903. The cubic root of 9090691693 is about 2087.0473857676.

The spelling of 9090691693 in words is "nine billion, ninety million, six hundred ninety-one thousand, six hundred ninety-three".