85454643 has 4 divisors (see below), whose sum is σ = 113939528. Its totient is φ = 56969760.

The previous prime is 85454639. The next prime is 85454651. The reversal of 85454643 is 34645458.

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

It is not a de Polignac number, because 85454643 - 2² = 85454639 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85454623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14242438 + ... + 14242443.

It is an arithmetic number, because the mean of its divisors is an integer number (28484882).

Almost surely, 2^85454643 is an apocalyptic number.

85454643 is a deficient number, since it is larger than the sum of its proper divisors (28484885).

85454643 is a wasteful number, since it uses less digits than its factorization.

85454643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28484884.

The product of its digits is 230400, while the sum is 39.

The square root of 85454643 is about 9244.1680534270. The cubic root of 85454643 is about 440.4654904953.

The spelling of 85454643 in words is "eighty-five million, four hundred fifty-four thousand, six hundred forty-three".