85316947 has 2 divisors, whose sum is σ = 85316948. Its totient is φ = 85316946.

The previous prime is 85316899. The next prime is 85316969. The reversal of 85316947 is 74961358.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85316947 is a prime.

It is not a weakly prime, because it can be changed into another prime (85316977) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42658473 + 42658474.

It is an arithmetic number, because the mean of its divisors is an integer number (42658474).

Almost surely, 2^85316947 is an apocalyptic number.

85316947 is a deficient number, since it is larger than the sum of its proper divisors (1).

85316947 is an equidigital number, since it uses as much as digits as its factorization.

85316947 is an evil number, because the sum of its binary digits is even.

The product of its digits is 181440, while the sum is 43.

The square root of 85316947 is about 9236.7173281421. The cubic root of 85316947 is about 440.2287842567.

The spelling of 85316947 in words is "eighty-five million, three hundred sixteen thousand, nine hundred forty-seven".