85476639 has 4 divisors (see below), whose sum is σ = 113968856. Its totient is φ = 56984424.

The previous prime is 85476613. The next prime is 85476661. The reversal of 85476639 is 93667458.

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

It is not a de Polignac number, because 85476639 - 2⁵ = 85476607 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 (85476679) 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, 14246104 + ... + 14246109.

It is an arithmetic number, because the mean of its divisors is an integer number (28492214).

Almost surely, 2^85476639 is an apocalyptic number.

85476639 is a deficient number, since it is larger than the sum of its proper divisors (28492217).

85476639 is a wasteful number, since it uses less digits than its factorization.

85476639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28492216.

The product of its digits is 1088640, while the sum is 48.

The square root of 85476639 is about 9245.3576999487. The cubic root of 85476639 is about 440.5032791492.

The spelling of 85476639 in words is "eighty-five million, four hundred seventy-six thousand, six hundred thirty-nine".