86571401897 has 2 divisors, whose sum is σ = 86571401898. Its totient is φ = 86571401896.

The previous prime is 86571401879. The next prime is 86571401927. The reversal of 86571401897 is 79810417568.

It is a happy number.

Together with previous prime (86571401879) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 53208187561 + 33363214336 = 230669^2 + 182656^2 .

It is a cyclic number.

It is not a de Polignac number, because 86571401897 - 2¹⁶ = 86571336361 is a prime.

It is not a weakly prime, because it can be changed into another prime (86571401827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43285700948 + 43285700949.

It is an arithmetic number, because the mean of its divisors is an integer number (43285700949).

Almost surely, 2^86571401897 is an apocalyptic number.

It is an amenable number.

86571401897 is a deficient number, since it is larger than the sum of its proper divisors (1).

86571401897 is an equidigital number, since it uses as much as digits as its factorization.

86571401897 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3386880, while the sum is 56.

The spelling of 86571401897 in words is "eighty-six billion, five hundred seventy-one million, four hundred one thousand, eight hundred ninety-seven".