85109647 has 4 divisors (see below), whose sum is σ = 97268176. Its totient is φ = 72951120.

The previous prime is 85109587. The next prime is 85109653. The reversal of 85109647 is 74690158.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74690158 = 2 ⋅37345079.

It is a cyclic number.

It is not a de Polignac number, because 85109647 - 2¹¹ = 85107599 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85109677) 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, 6079254 + ... + 6079267.

It is an arithmetic number, because the mean of its divisors is an integer number (24317044).

Almost surely, 2^85109647 is an apocalyptic number.

85109647 is a deficient number, since it is larger than the sum of its proper divisors (12158529).

85109647 is a wasteful number, since it uses less digits than its factorization.

85109647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12158528.

The product of its (nonzero) digits is 60480, while the sum is 40.

The square root of 85109647 is about 9225.4889843303. The cubic root of 85109647 is about 439.8719444843.

The spelling of 85109647 in words is "eighty-five million, one hundred nine thousand, six hundred forty-seven".