85723715197 has 4 divisors (see below), whose sum is σ = 85731636316. Its totient is φ = 85715794080.

The previous prime is 85723715171. The next prime is 85723715257. The reversal of 85723715197 is 79151732758.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 46840213476 + 38883501721 = 216426^2 + 197189^2 .

It is a cyclic number.

It is not a de Polignac number, because 85723715197 - 2⁷ = 85723715069 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 (85723715107) 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, 3944304 + ... + 3965977.

It is an arithmetic number, because the mean of its divisors is an integer number (21432909079).

Almost surely, 2^85723715197 is an apocalyptic number.

It is an amenable number.

85723715197 is a deficient number, since it is larger than the sum of its proper divisors (7921119).

85723715197 is a wasteful number, since it uses less digits than its factorization.

85723715197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7921118.

The product of its digits is 3704400, while the sum is 55.

The spelling of 85723715197 in words is "eighty-five billion, seven hundred twenty-three million, seven hundred fifteen thousand, one hundred ninety-seven".