85429819 has 2 divisors, whose sum is σ = 85429820. Its totient is φ = 85429818.

The previous prime is 85429807. The next prime is 85429849. The reversal of 85429819 is 91892458.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 85429819 - 2¹³ = 85421627 is a prime.

It is a super-2 number, since 2×85429819² = 14596507948745522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (85429849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42714909 + 42714910.

It is an arithmetic number, because the mean of its divisors is an integer number (42714910).

Almost surely, 2^85429819 is an apocalyptic number.

85429819 is a deficient number, since it is larger than the sum of its proper divisors (1).

85429819 is an equidigital number, since it uses as much as digits as its factorization.

85429819 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 207360, while the sum is 46.

The square root of 85429819 is about 9242.8252715282. The cubic root of 85429819 is about 440.4228356089.

The spelling of 85429819 in words is "eighty-five million, four hundred twenty-nine thousand, eight hundred nineteen".