85351687 has 4 divisors (see below), whose sum is σ = 86134840. Its totient is φ = 84568536.

The previous prime is 85351681. The next prime is 85351691. The reversal of 85351687 is 78615358.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78615358 = 2 ⋅39307679.

It is a cyclic number.

It is not a de Polignac number, because 85351687 - 2⁷ = 85351559 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 (85351681) 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, 391413 + ... + 391630.

It is an arithmetic number, because the mean of its divisors is an integer number (21533710).

Almost surely, 2^85351687 is an apocalyptic number.

85351687 is a deficient number, since it is larger than the sum of its proper divisors (783153).

85351687 is a wasteful number, since it uses less digits than its factorization.

85351687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 783152.

The product of its digits is 201600, while the sum is 43.

The square root of 85351687 is about 9238.5976749721. The cubic root of 85351687 is about 440.2885280442.

The spelling of 85351687 in words is "eighty-five million, three hundred fifty-one thousand, six hundred eighty-seven".