85717479 has 8 divisors (see below), whose sum is σ = 114393712. Its totient is φ = 57093120.

The previous prime is 85717469. The next prime is 85717487. The reversal of 85717479 is 97471758.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-85717479 is a prime.

It is a super-2 number, since 2×85717479² = 14694972412230882, which contains 22 as substring.

It is a Duffinian number.

It is a nialpdrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85717469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8932 + ... + 15849.

It is an arithmetic number, because the mean of its divisors is an integer number (14299214).

Almost surely, 2^85717479 is an apocalyptic number.

85717479 is a deficient number, since it is larger than the sum of its proper divisors (28676233).

85717479 is a wasteful number, since it uses less digits than its factorization.

85717479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25937.

The product of its digits is 493920, while the sum is 48.

The square root of 85717479 is about 9258.3734532584. The cubic root of 85717479 is about 440.9166136219.

It can be divided in two parts, 857 and 17479, that added together give a triangular number (18336 = T₁₉₁).

The spelling of 85717479 in words is "eighty-five million, seven hundred seventeen thousand, four hundred seventy-nine".