85406579 has 4 divisors (see below), whose sum is σ = 85715184. Its totient is φ = 85097976.

The previous prime is 85406551. The next prime is 85406591. The reversal of 85406579 is 97560458.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97560458 = 2 ⋅48780229.

It is a cyclic number.

It is not a de Polignac number, because 85406579 - 2¹⁶ = 85341043 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85406549) 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, 153887 + ... + 154440.

It is an arithmetic number, because the mean of its divisors is an integer number (21428796).

Almost surely, 2^85406579 is an apocalyptic number.

85406579 is a deficient number, since it is larger than the sum of its proper divisors (308605).

85406579 is a wasteful number, since it uses less digits than its factorization.

85406579 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 308604.

The product of its (nonzero) digits is 302400, while the sum is 44.

The square root of 85406579 is about 9241.5679946641. The cubic root of 85406579 is about 440.3828950078.

The spelling of 85406579 in words is "eighty-five million, four hundred six thousand, five hundred seventy-nine".