85470071 has 2 divisors, whose sum is σ = 85470072. Its totient is φ = 85470070.

The previous prime is 85470043. The next prime is 85470097. The reversal of 85470071 is 17007458.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85470071 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85476071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42735035 + 42735036.

It is an arithmetic number, because the mean of its divisors is an integer number (42735036).

Almost surely, 2^85470071 is an apocalyptic number.

85470071 is a deficient number, since it is larger than the sum of its proper divisors (1).

85470071 is an equidigital number, since it uses as much as digits as its factorization.

85470071 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7840, while the sum is 32.

The square root of 85470071 is about 9245.0024878309. The cubic root of 85470071 is about 440.4919961457.

The spelling of 85470071 in words is "eighty-five million, four hundred seventy thousand, seventy-one".