85193561 has 4 divisors (see below), whose sum is σ = 88131300. Its totient is φ = 82255824.

The previous prime is 85193557. The next prime is 85193569. The reversal of 85193561 is 16539158.

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 14969161 + 70224400 = 3869^2 + 8380^2 .

It is a cyclic number.

It is not a de Polignac number, because 85193561 - 2² = 85193557 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (85193569) 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, 1468826 + ... + 1468883.

It is an arithmetic number, because the mean of its divisors is an integer number (22032825).

Almost surely, 2^85193561 is an apocalyptic number.

It is an amenable number.

85193561 is a deficient number, since it is larger than the sum of its proper divisors (2937739).

85193561 is a wasteful number, since it uses less digits than its factorization.

85193561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2937738.

The product of its digits is 32400, while the sum is 38.

The square root of 85193561 is about 9230.0358070811. The cubic root of 85193561 is about 440.0164611610.

The spelling of 85193561 in words is "eighty-five million, one hundred ninety-three thousand, five hundred sixty-one".