85433809 has 4 divisors (see below), whose sum is σ = 86463216. Its totient is φ = 84404404.

The previous prime is 85433807. The next prime is 85433813. The reversal of 85433809 is 90833458.

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 not a de Polignac number, because 85433809 - 2¹ = 85433807 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85433807) 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, 514579 + ... + 514744.

It is an arithmetic number, because the mean of its divisors is an integer number (21615804).

Almost surely, 2^85433809 is an apocalyptic number.

It is an amenable number.

85433809 is a deficient number, since it is larger than the sum of its proper divisors (1029407).

85433809 is a wasteful number, since it uses less digits than its factorization.

85433809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1029406.

The product of its (nonzero) digits is 103680, while the sum is 40.

The square root of 85433809 is about 9243.0411121016. The cubic root of 85433809 is about 440.4296921522.

The spelling of 85433809 in words is "eighty-five million, four hundred thirty-three thousand, eight hundred nine".