86687422621889 has 2 divisors, whose sum is σ = 86687422621890. Its totient is φ = 86687422621888.

The previous prime is 86687422621883. The next prime is 86687422621897. The reversal of 86687422621889 is 98812622478668.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 79222549497025 + 7464873124864 = 8900705^2 + 2732192^2 .

It is a cyclic number.

It is not a de Polignac number, because 86687422621889 - 2¹² = 86687422617793 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (86687422621883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43343711310944 + 43343711310945.

It is an arithmetic number, because the mean of its divisors is an integer number (43343711310945).

Almost surely, 2^{86687422621889} is an apocalyptic number.

It is an amenable number.

86687422621889 is a deficient number, since it is larger than the sum of its proper divisors (1).

86687422621889 is an equidigital number, since it uses as much as digits as its factorization.

86687422621889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1783627776, while the sum is 77.

The spelling of 86687422621889 in words is "eighty-six trillion, six hundred eighty-seven billion, four hundred twenty-two million, six hundred twenty-one thousand, eight hundred eighty-nine".