86813189 has 2 divisors, whose sum is σ = 86813190. Its totient is φ = 86813188.

The previous prime is 86813149. The next prime is 86813227. The reversal of 86813189 is 98131868.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 77141089 + 9672100 = 8783^2 + 3110^2 .

It is a cyclic number.

It is not a de Polignac number, because 86813189 - 2⁸ = 86812933 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86813149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43406594 + 43406595.

It is an arithmetic number, because the mean of its divisors is an integer number (43406595).

Almost surely, 2^86813189 is an apocalyptic number.

It is an amenable number.

86813189 is a deficient number, since it is larger than the sum of its proper divisors (1).

86813189 is an equidigital number, since it uses as much as digits as its factorization.

86813189 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 82944, while the sum is 44.

The square root of 86813189 is about 9317.3595508599. The cubic root of 86813189 is about 442.7873822379.

The spelling of 86813189 in words is "eighty-six million, eight hundred thirteen thousand, one hundred eighty-nine".