85679291293 has 4 divisors (see below), whose sum is σ = 85808912668. Its totient is φ = 85549669920.

The previous prime is 85679291279. The next prime is 85679291323. The reversal of 85679291293 is 39219297658.

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 47191914169 + 38487377124 = 217237^2 + 196182^2 .

It is a cyclic number.

It is not a de Polignac number, because 85679291293 - 2²⁹ = 85142420381 is a prime.

It is a super-2 number, since 2×85679291293² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85679291993) 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, 64809696 + ... + 64811017.

It is an arithmetic number, because the mean of its divisors is an integer number (21452228167).

Almost surely, 2^85679291293 is an apocalyptic number.

It is an amenable number.

85679291293 is a deficient number, since it is larger than the sum of its proper divisors (129621375).

85679291293 is a wasteful number, since it uses less digits than its factorization.

85679291293 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129621374.

The product of its digits is 14696640, while the sum is 61.

The spelling of 85679291293 in words is "eighty-five billion, six hundred seventy-nine million, two hundred ninety-one thousand, two hundred ninety-three".