85423191293 has 4 divisors (see below), whose sum is σ = 93188935968. Its totient is φ = 77657446620.

The previous prime is 85423191283. The next prime is 85423191307. The reversal of 85423191293 is 39219132458.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85423191293 is a prime.

It is a super-2 number, since 2×85423191293² (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 (85423191283) 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, 3882872321 + ... + 3882872342.

It is an arithmetic number, because the mean of its divisors is an integer number (23297233992).

Almost surely, 2^85423191293 is an apocalyptic number.

It is an amenable number.

85423191293 is a deficient number, since it is larger than the sum of its proper divisors (7765744675).

85423191293 is a wasteful number, since it uses less digits than its factorization.

85423191293 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7765744674.

The product of its digits is 466560, while the sum is 47.

The spelling of 85423191293 in words is "eighty-five billion, four hundred twenty-three million, one hundred ninety-one thousand, two hundred ninety-three".