90684559453 has 2 divisors, whose sum is σ = 90684559454. Its totient is φ = 90684559452.

The previous prime is 90684559421. The next prime is 90684559477. The reversal of 90684559453 is 35495548609.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 77349621924 + 13334937529 = 278118^2 + 115477^2 .

It is a cyclic number.

It is not a de Polignac number, because 90684559453 - 2⁵ = 90684559421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90684559753) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45342279726 + 45342279727.

It is an arithmetic number, because the mean of its divisors is an integer number (45342279727).

Almost surely, 2^90684559453 is an apocalyptic number.

It is an amenable number.

90684559453 is a deficient number, since it is larger than the sum of its proper divisors (1).

90684559453 is an equidigital number, since it uses as much as digits as its factorization.

90684559453 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23328000, while the sum is 58.

The spelling of 90684559453 in words is "ninety billion, six hundred eighty-four million, five hundred fifty-nine thousand, four hundred fifty-three".