86840197069 has 2 divisors, whose sum is σ = 86840197070. Its totient is φ = 86840197068.

The previous prime is 86840197021. The next prime is 86840197099. The reversal of 86840197069 is 96079104868.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 77779632100 + 9060564969 = 278890^2 + 95187^2 .

It is a cyclic number.

It is not a de Polignac number, because 86840197069 - 2²⁷ = 86705979341 is a prime.

It is a super-2 number, since 2×86840197069² (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 (86840197019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43420098534 + 43420098535.

It is an arithmetic number, because the mean of its divisors is an integer number (43420098535).

Almost surely, 2^86840197069 is an apocalyptic number.

It is an amenable number.

86840197069 is a deficient number, since it is larger than the sum of its proper divisors (1).

86840197069 is an equidigital number, since it uses as much as digits as its factorization.

86840197069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5225472, while the sum is 58.

The spelling of 86840197069 in words is "eighty-six billion, eight hundred forty million, one hundred ninety-seven thousand, sixty-nine".