89963809613 has 2 divisors, whose sum is σ = 89963809614. Its totient is φ = 89963809612.

The previous prime is 89963809589. The next prime is 89963809807. The reversal of 89963809613 is 31690836998.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 70754404009 + 19209405604 = 265997^2 + 138598^2 .

It is a cyclic number.

It is not a de Polignac number, because 89963809613 - 2²⁰ = 89962761037 is a prime.

It is a super-2 number, since 2×89963809613² (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 (89963859613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44981904806 + 44981904807.

It is an arithmetic number, because the mean of its divisors is an integer number (44981904807).

Almost surely, 2^89963809613 is an apocalyptic number.

It is an amenable number.

89963809613 is a deficient number, since it is larger than the sum of its proper divisors (1).

89963809613 is an equidigital number, since it uses as much as digits as its factorization.

89963809613 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15116544, while the sum is 62.

The spelling of 89963809613 in words is "eighty-nine billion, nine hundred sixty-three million, eight hundred nine thousand, six hundred thirteen".