89865707669 has 2 divisors, whose sum is σ = 89865707670. Its totient is φ = 89865707668.

The previous prime is 89865707647. The next prime is 89865707681. The reversal of 89865707669 is 96670756898.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 88060562500 + 1805145169 = 296750^2 + 42487^2 .

It is a cyclic number.

It is not a de Polignac number, because 89865707669 - 2¹² = 89865703573 is a prime.

It is a super-2 number, since 2×89865707669² (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 (89865707069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44932853834 + 44932853835.

It is an arithmetic number, because the mean of its divisors is an integer number (44932853835).

Almost surely, 2^89865707669 is an apocalyptic number.

It is an amenable number.

89865707669 is a deficient number, since it is larger than the sum of its proper divisors (1).

89865707669 is an equidigital number, since it uses as much as digits as its factorization.

89865707669 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 274337280, while the sum is 71.

The spelling of 89865707669 in words is "eighty-nine billion, eight hundred sixty-five million, seven hundred seven thousand, six hundred sixty-nine".