90835933693 has 2 divisors, whose sum is σ = 90835933694. Its totient is φ = 90835933692.

The previous prime is 90835933649. The next prime is 90835933703. The reversal of 90835933693 is 39633953809.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 90566087364 + 269846329 = 300942^2 + 16427^2 .

It is a cyclic number.

It is not a de Polignac number, because 90835933693 - 2¹³ = 90835925501 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90835933603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45417966846 + 45417966847.

It is an arithmetic number, because the mean of its divisors is an integer number (45417966847).

Almost surely, 2^90835933693 is an apocalyptic number.

It is an amenable number.

90835933693 is a deficient number, since it is larger than the sum of its proper divisors (1).

90835933693 is an equidigital number, since it uses as much as digits as its factorization.

90835933693 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14171760, while the sum is 58.

The spelling of 90835933693 in words is "ninety billion, eight hundred thirty-five million, nine hundred thirty-three thousand, six hundred ninety-three".