85209743 has 8 divisors (see below), whose sum is σ = 89812800. Its totient is φ = 80717728.

The previous prime is 85209713. The next prime is 85209781. The reversal of 85209743 is 34790258.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 85209743 - 2²² = 81015439 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 85209697 and 85209706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85209713) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26183 + ... + 29256.

It is an arithmetic number, because the mean of its divisors is an integer number (11226600).

Almost surely, 2^85209743 is an apocalyptic number.

85209743 is a deficient number, since it is larger than the sum of its proper divisors (4603057).

85209743 is a wasteful number, since it uses less digits than its factorization.

85209743 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55521.

The product of its (nonzero) digits is 60480, while the sum is 38.

The square root of 85209743 is about 9230.9123601083. The cubic root of 85209743 is about 440.0443188829.

The spelling of 85209743 in words is "eighty-five million, two hundred nine thousand, seven hundred forty-three".