86190989 has 2 divisors, whose sum is σ = 86190990. Its totient is φ = 86190988.

The previous prime is 86190967. The next prime is 86191031. The reversal of 86190989 is 98909168.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 86174089 + 16900 = 9283^2 + 130^2 .

It is a cyclic number.

It is not a de Polignac number, because 86190989 - 2¹⁶ = 86125453 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86190919) 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, 43095494 + 43095495.

It is an arithmetic number, because the mean of its divisors is an integer number (43095495).

Almost surely, 2^86190989 is an apocalyptic number.

It is an amenable number.

86190989 is a deficient number, since it is larger than the sum of its proper divisors (1).

86190989 is an equidigital number, since it uses as much as digits as its factorization.

86190989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 279936, while the sum is 50.

The square root of 86190989 is about 9283.9102214530. The cubic root of 86190989 is about 441.7270090727.

The spelling of 86190989 in words is "eighty-six million, one hundred ninety thousand, nine hundred eighty-nine".