85879429 has 2 divisors, whose sum is σ = 85879430. Its totient is φ = 85879428.

The previous prime is 85879357. The next prime is 85879433. The reversal of 85879429 is 92497858.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 85840225 + 39204 = 9265^2 + 198^2 .

It is a cyclic number.

It is not a de Polignac number, because 85879429 - 2⁷ = 85879301 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85879439) 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, 42939714 + 42939715.

It is an arithmetic number, because the mean of its divisors is an integer number (42939715).

Almost surely, 2^85879429 is an apocalyptic number.

It is an amenable number.

85879429 is a deficient number, since it is larger than the sum of its proper divisors (1).

85879429 is an equidigital number, since it uses as much as digits as its factorization.

85879429 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1451520, while the sum is 52.

The square root of 85879429 is about 9267.1154627532. The cubic root of 85879429 is about 441.1941203142.

The spelling of 85879429 in words is "eighty-five million, eight hundred seventy-nine thousand, four hundred twenty-nine".