85478861 has 8 divisors (see below), whose sum is σ = 92140440. Its totient is φ = 78829632.

The previous prime is 85478857. The next prime is 85478867. The reversal of 85478861 is 16887458.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 6375625 + 79103236 = 2525^2 + 8894^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 85478861 - 2² = 85478857 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 (85478867) 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 7 ways as a sum of consecutive naturals, for example, 15455 + ... + 20243.

It is an arithmetic number, because the mean of its divisors is an integer number (11517555).

Almost surely, 2^85478861 is an apocalyptic number.

It is an amenable number.

85478861 is a deficient number, since it is larger than the sum of its proper divisors (6661579).

85478861 is a wasteful number, since it uses less digits than its factorization.

85478861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6175.

The product of its digits is 430080, while the sum is 47.

The square root of 85478861 is about 9245.4778675848. The cubic root of 85478861 is about 440.5070961368.

The spelling of 85478861 in words is "eighty-five million, four hundred seventy-eight thousand, eight hundred sixty-one".