86846989 has 2 divisors, whose sum is σ = 86846990. Its totient is φ = 86846988.

The previous prime is 86846957. The next prime is 86846993. The reversal of 86846989 is 98964868.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54834025 + 32012964 = 7405^2 + 5658^2 .

It is a cyclic number.

It is not a de Polignac number, because 86846989 - 2⁵ = 86846957 is a prime.

It is a super-2 number, since 2×86846989² = 15084798996732242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86846939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43423494 + 43423495.

It is an arithmetic number, because the mean of its divisors is an integer number (43423495).

Almost surely, 2^86846989 is an apocalyptic number.

It is an amenable number.

86846989 is a deficient number, since it is larger than the sum of its proper divisors (1).

86846989 is an equidigital number, since it uses as much as digits as its factorization.

86846989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5971968, while the sum is 58.

The square root of 86846989 is about 9319.1731929394. The cubic root of 86846989 is about 442.8448399882.

The spelling of 86846989 in words is "eighty-six million, eight hundred forty-six thousand, nine hundred eighty-nine".