89387085517 has 2 divisors, whose sum is σ = 89387085518. Its totient is φ = 89387085516.

The previous prime is 89387085421. The next prime is 89387085577. The reversal of 89387085517 is 71558078398.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 77294564361 + 12092521156 = 278019^2 + 109966^2 .

It is a cyclic number.

It is not a de Polignac number, because 89387085517 - 2¹⁵ = 89387052749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (89387085577) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44693542758 + 44693542759.

It is an arithmetic number, because the mean of its divisors is an integer number (44693542759).

Almost surely, 2^89387085517 is an apocalyptic number.

It is an amenable number.

89387085517 is a deficient number, since it is larger than the sum of its proper divisors (1).

89387085517 is an equidigital number, since it uses as much as digits as its factorization.

89387085517 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16934400, while the sum is 61.

The spelling of 89387085517 in words is "eighty-nine billion, three hundred eighty-seven million, eighty-five thousand, five hundred seventeen".