85049971 has 2 divisors, whose sum is σ = 85049972. Its totient is φ = 85049970.

The previous prime is 85049933. The next prime is 85050083. The reversal of 85049971 is 17994058.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 85049971 - 2¹³ = 85041779 is a prime.

It is equal to p_4946398 and since 85049971 and 4946398 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (85049911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42524985 + 42524986.

It is an arithmetic number, because the mean of its divisors is an integer number (42524986).

Almost surely, 2^85049971 is an apocalyptic number.

85049971 is a deficient number, since it is larger than the sum of its proper divisors (1).

85049971 is an equidigital number, since it uses as much as digits as its factorization.

85049971 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 90720, while the sum is 43.

The square root of 85049971 is about 9222.2541170801. The cubic root of 85049971 is about 439.7691126799.

The spelling of 85049971 in words is "eighty-five million, forty-nine thousand, nine hundred seventy-one".