90083085661 has 2 divisors, whose sum is σ = 90083085662. Its totient is φ = 90083085660.

The previous prime is 90083085647. The next prime is 90083085707. The reversal of 90083085661 is 16658038009.

It is an a-pointer prime, because the next prime (90083085707) can be obtained adding 90083085661 to its sum of digits (46).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 81982005625 + 8101080036 = 286325^2 + 90006^2 .

It is an emirp because it is prime and its reverse (16658038009) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 90083085661 - 2¹⁵ = 90083052893 is a prime.

It is a super-2 number, since 2×90083085661² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90083085611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45041542830 + 45041542831.

It is an arithmetic number, because the mean of its divisors is an integer number (45041542831).

Almost surely, 2^90083085661 is an apocalyptic number.

It is an amenable number.

90083085661 is a deficient number, since it is larger than the sum of its proper divisors (1).

90083085661 is an equidigital number, since it uses as much as digits as its factorization.

90083085661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 311040, while the sum is 46.

The spelling of 90083085661 in words is "ninety billion, eighty-three million, eighty-five thousand, six hundred sixty-one".