85842947 has 4 divisors (see below), whose sum is σ = 86278896. Its totient is φ = 85407000.

The previous prime is 85842941. The next prime is 85842949. The reversal of 85842947 is 74924858.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74924858 = 2 ⋅37462429.

It is a cyclic number.

It is not a de Polignac number, because 85842947 - 2¹⁰ = 85841923 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85842941) 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, 217679 + ... + 218072.

It is an arithmetic number, because the mean of its divisors is an integer number (21569724).

Almost surely, 2^85842947 is an apocalyptic number.

85842947 is a deficient number, since it is larger than the sum of its proper divisors (435949).

85842947 is a wasteful number, since it uses less digits than its factorization.

85842947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 435948.

The product of its digits is 645120, while the sum is 47.

The square root of 85842947 is about 9265.1468957594. The cubic root of 85842947 is about 441.1316376615.

The spelling of 85842947 in words is "eighty-five million, eight hundred forty-two thousand, nine hundred forty-seven".