89393639849 has 2 divisors, whose sum is σ = 89393639850. Its totient is φ = 89393639848.

The previous prime is 89393639767. The next prime is 89393639879. The reversal of 89393639849 is 94893639398.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64648147600 + 24745492249 = 254260^2 + 157307^2 .

It is a cyclic number.

It is not a de Polignac number, because 89393639849 - 2²⁴ = 89376862633 is a prime.

It is not a weakly prime, because it can be changed into another prime (89393639879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44696819924 + 44696819925.

It is an arithmetic number, because the mean of its divisors is an integer number (44696819925).

Almost surely, 2^89393639849 is an apocalyptic number.

It is an amenable number.

89393639849 is a deficient number, since it is larger than the sum of its proper divisors (1).

89393639849 is an equidigital number, since it uses as much as digits as its factorization.

89393639849 is an evil number, because the sum of its binary digits is even.

The product of its digits is 272097792, while the sum is 71.

The spelling of 89393639849 in words is "eighty-nine billion, three hundred ninety-three million, six hundred thirty-nine thousand, eight hundred forty-nine".