86704590691 has 2 divisors, whose sum is σ = 86704590692. Its totient is φ = 86704590690.

The previous prime is 86704590689. The next prime is 86704590761. The reversal of 86704590691 is 19609540768.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 86704590691 - 2¹ = 86704590689 is a prime.

Together with 86704590689, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (86704590611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43352295345 + 43352295346.

It is an arithmetic number, because the mean of its divisors is an integer number (43352295346).

Almost surely, 2^86704590691 is an apocalyptic number.

86704590691 is a deficient number, since it is larger than the sum of its proper divisors (1).

86704590691 is an equidigital number, since it uses as much as digits as its factorization.

86704590691 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3265920, while the sum is 55.

The spelling of 86704590691 in words is "eighty-six billion, seven hundred four million, five hundred ninety thousand, six hundred ninety-one".