85071983 has 2 divisors, whose sum is σ = 85071984. Its totient is φ = 85071982.

The previous prime is 85071947. The next prime is 85072033. The reversal of 85071983 is 38917058.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 85071983 - 2⁶ = 85071919 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 85071983.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85071583) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42535991 + 42535992.

It is an arithmetic number, because the mean of its divisors is an integer number (42535992).

Almost surely, 2^85071983 is an apocalyptic number.

85071983 is a deficient number, since it is larger than the sum of its proper divisors (1).

85071983 is an equidigital number, since it uses as much as digits as its factorization.

85071983 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 60480, while the sum is 41.

The square root of 85071983 is about 9223.4474574315. The cubic root of 85071983 is about 439.8070486627.

The spelling of 85071983 in words is "eighty-five million, seventy-one thousand, nine hundred eighty-three".