86573891 has 2 divisors, whose sum is σ = 86573892. Its totient is φ = 86573890.

The previous prime is 86573819. The next prime is 86573923. The reversal of 86573891 is 19837568.

It is a happy number.

Together with previous prime (86573819) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 86573891 - 2¹⁰ = 86572867 is a prime.

It is not a weakly prime, because it can be changed into another prime (86573801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43286945 + 43286946.

It is an arithmetic number, because the mean of its divisors is an integer number (43286946).

Almost surely, 2^86573891 is an apocalyptic number.

86573891 is a deficient number, since it is larger than the sum of its proper divisors (1).

86573891 is an equidigital number, since it uses as much as digits as its factorization.

86573891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 362880, while the sum is 47.

The square root of 86573891 is about 9304.5091756632. The cubic root of 86573891 is about 442.3801643854.

The spelling of 86573891 in words is "eighty-six million, five hundred seventy-three thousand, eight hundred ninety-one".