85470019 has 2 divisors, whose sum is σ = 85470020. Its totient is φ = 85470018.

The previous prime is 85469987. The next prime is 85470029. The reversal of 85470019 is 91007458.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 85470019 - 2⁵ = 85469987 is a prime.

It is a super-2 number, since 2×85470019² = 14610248295720722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (85470029) 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, 42735009 + 42735010.

It is an arithmetic number, because the mean of its divisors is an integer number (42735010).

Almost surely, 2^85470019 is an apocalyptic number.

85470019 is a deficient number, since it is larger than the sum of its proper divisors (1).

85470019 is an equidigital number, since it uses as much as digits as its factorization.

85470019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10080, while the sum is 34.

The square root of 85470019 is about 9244.9996755003. Note that the first 3 decimals coincide. The cubic root of 85470019 is about 440.4919068139.

The spelling of 85470019 in words is "eighty-five million, four hundred seventy thousand, nineteen".