86718829 has 2 divisors, whose sum is σ = 86718830. Its totient is φ = 86718828.

The previous prime is 86718803. The next prime is 86718851. The reversal of 86718829 is 92881768.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 86062729 + 656100 = 9277^2 + 810^2 .

It is a cyclic number.

It is not a de Polignac number, because 86718829 - 2¹⁷ = 86587757 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86718859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43359414 + 43359415.

It is an arithmetic number, because the mean of its divisors is an integer number (43359415).

Almost surely, 2^86718829 is an apocalyptic number.

It is an amenable number.

86718829 is a deficient number, since it is larger than the sum of its proper divisors (1).

86718829 is an equidigital number, since it uses as much as digits as its factorization.

86718829 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 387072, while the sum is 49.

The square root of 86718829 is about 9312.2945077999. The cubic root of 86718829 is about 442.6268975433.

The spelling of 86718829 in words is "eighty-six million, seven hundred eighteen thousand, eight hundred twenty-nine".