90505000093 has 2 divisors, whose sum is σ = 90505000094. Its totient is φ = 90505000092.

The previous prime is 90505000087. The next prime is 90505000097. The reversal of 90505000093 is 39000050509.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 88531241764 + 1973758329 = 297542^2 + 44427^2 .

It is a cyclic number.

It is not a de Polignac number, because 90505000093 - 2⁹ = 90504999581 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90505000097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45252500046 + 45252500047.

It is an arithmetic number, because the mean of its divisors is an integer number (45252500047).

Almost surely, 2^90505000093 is an apocalyptic number.

It is an amenable number.

90505000093 is a deficient number, since it is larger than the sum of its proper divisors (1).

90505000093 is an equidigital number, since it uses as much as digits as its factorization.

90505000093 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6075, while the sum is 31.

The spelling of 90505000093 in words is "ninety billion, five hundred five million, ninety-three", and thus it is an aban number.