85434923 has 4 divisors (see below), whose sum is σ = 97639920. Its totient is φ = 73229928.

The previous prime is 85434917. The next prime is 85434931. The reversal of 85434923 is 32943458.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32943458 = 2 ⋅16471729.

It is a cyclic number.

It is not a de Polignac number, because 85434923 - 2²⁰ = 84386347 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is not an unprimeable number, because it can be changed into a prime (85434913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6102488 + ... + 6102501.

It is an arithmetic number, because the mean of its divisors is an integer number (24409980).

Almost surely, 2^85434923 is an apocalyptic number.

85434923 is a deficient number, since it is larger than the sum of its proper divisors (12204997).

85434923 is a wasteful number, since it uses less digits than its factorization.

85434923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12204996.

The product of its digits is 103680, while the sum is 38.

The square root of 85434923 is about 9243.1013734569. The cubic root of 85434923 is about 440.4316064472.

The spelling of 85434923 in words is "eighty-five million, four hundred thirty-four thousand, nine hundred twenty-three".