85371973 has 4 divisors (see below), whose sum is σ = 85392268. Its totient is φ = 85351680.

The previous prime is 85371953. The next prime is 85371989. The reversal of 85371973 is 37917358.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 37917358 = 2 ⋅18958679.

It can be written as a sum of positive squares in 2 ways, for example, as 1044484 + 84327489 = 1022^2 + 9183^2 .

It is a cyclic number.

It is not a de Polignac number, because 85371973 - 2¹⁷ = 85240901 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85371953) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1218 + ... + 13123.

It is an arithmetic number, because the mean of its divisors is an integer number (21348067).

Almost surely, 2^85371973 is an apocalyptic number.

It is an amenable number.

85371973 is a deficient number, since it is larger than the sum of its proper divisors (20295).

85371973 is a wasteful number, since it uses less digits than its factorization.

85371973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20294.

The product of its digits is 158760, while the sum is 43.

The square root of 85371973 is about 9239.6955036408. The cubic root of 85371973 is about 440.3234072046.

The spelling of 85371973 in words is "eighty-five million, three hundred seventy-one thousand, nine hundred seventy-three".