85079639 has 4 divisors (see below), whose sum is σ = 86035680. Its totient is φ = 84123600.

The previous prime is 85079627. The next prime is 85079641. The reversal of 85079639 is 93697058.

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

It is a cyclic number.

It is not a de Polignac number, because 85079639 - 2²⁰ = 84031063 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 85079593 and 85079602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85079609) 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, 477887 + ... + 478064.

It is an arithmetic number, because the mean of its divisors is an integer number (21508920).

Almost surely, 2^85079639 is an apocalyptic number.

85079639 is a gapful number since it is divisible by the number (89) formed by its first and last digit.

85079639 is a deficient number, since it is larger than the sum of its proper divisors (956041).

85079639 is an equidigital number, since it uses as much as digits as its factorization.

85079639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 956040.

The product of its (nonzero) digits is 408240, while the sum is 47.

The square root of 85079639 is about 9223.8624772923. The cubic root of 85079639 is about 439.8202416539.

The spelling of 85079639 in words is "eighty-five million, seventy-nine thousand, six hundred thirty-nine".