86206979 has 2 divisors, whose sum is σ = 86206980. Its totient is φ = 86206978.

The previous prime is 86206963. The next prime is 86206987. The reversal of 86206979 is 97960268.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 86206979 - 2⁴ = 86206963 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (86206079) 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, 43103489 + 43103490.

It is an arithmetic number, because the mean of its divisors is an integer number (43103490).

Almost surely, 2^86206979 is an apocalyptic number.

86206979 is a deficient number, since it is larger than the sum of its proper divisors (1).

86206979 is an equidigital number, since it uses as much as digits as its factorization.

86206979 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 326592, while the sum is 47.

The square root of 86206979 is about 9284.7713488271. The cubic root of 86206979 is about 441.7543235218.

The spelling of 86206979 in words is "eighty-six million, two hundred six thousand, nine hundred seventy-nine".