85470029 has 2 divisors, whose sum is σ = 85470030. Its totient is φ = 85470028.

The previous prime is 85470019. The next prime is 85470043. The reversal of 85470029 is 92007458.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 85470025 + 4 = 9245^2 + 2^2 .

It is a cyclic number.

It is not a de Polignac number, because 85470029 - 2⁸ = 85469773 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85470019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42735014 + 42735015.

It is an arithmetic number, because the mean of its divisors is an integer number (42735015).

Almost surely, 2^85470029 is an apocalyptic number.

It is an amenable number.

85470029 is a deficient number, since it is larger than the sum of its proper divisors (1).

85470029 is an equidigital number, since it uses as much as digits as its factorization.

85470029 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20160, while the sum is 35.

The square root of 85470029 is about 9245.0002163332. Note that the first 3 decimals coincide. The cubic root of 85470029 is about 440.4919239931.

The spelling of 85470029 in words is "eighty-five million, four hundred seventy thousand, twenty-nine".