85391743 has 4 divisors (see below), whose sum is σ = 85670200. Its totient is φ = 85113288.

The previous prime is 85391741. The next prime is 85391749. The reversal of 85391743 is 34719358.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34719358 = 2 ⋅17359679.

It is a cyclic number.

It is not a de Polignac number, because 85391743 - 2¹ = 85391741 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 85391696 and 85391705.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85391741) 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, 138768 + ... + 139381.

It is an arithmetic number, because the mean of its divisors is an integer number (21417550).

Almost surely, 2^85391743 is an apocalyptic number.

85391743 is a deficient number, since it is larger than the sum of its proper divisors (278457).

85391743 is a wasteful number, since it uses less digits than its factorization.

85391743 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278456.

The product of its digits is 90720, while the sum is 40.

The square root of 85391743 is about 9240.7652821614. The cubic root of 85391743 is about 440.3573938538.

The spelling of 85391743 in words is "eighty-five million, three hundred ninety-one thousand, seven hundred forty-three".