89853729809 has 2 divisors, whose sum is σ = 89853729810. Its totient is φ = 89853729808.

The previous prime is 89853729781. The next prime is 89853729851. The reversal of 89853729809 is 90892735898.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 81894413584 + 7959316225 = 286172^2 + 89215^2 .

It is a cyclic number.

It is not a de Polignac number, because 89853729809 - 2²⁸ = 89585294353 is a prime.

It is not a weakly prime, because it can be changed into another prime (89853729509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44926864904 + 44926864905.

It is an arithmetic number, because the mean of its divisors is an integer number (44926864905).

Almost surely, 2^89853729809 is an apocalyptic number.

It is an amenable number.

89853729809 is a deficient number, since it is larger than the sum of its proper divisors (1).

89853729809 is an equidigital number, since it uses as much as digits as its factorization.

89853729809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 78382080, while the sum is 68.

The spelling of 89853729809 in words is "eighty-nine billion, eight hundred fifty-three million, seven hundred twenty-nine thousand, eight hundred nine".