85471786 has 4 divisors (see below), whose sum is σ = 128207682. Its totient is φ = 42735892.

The previous prime is 85471783. The next prime is 85471811. The reversal of 85471786 is 68717458.

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

It can be written as a sum of positive squares in only one way, i.e., 75429225 + 10042561 = 8685^2 + 3169^2 .

It is not an unprimeable number, because it can be changed into a prime (85471781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21367945 + ... + 21367948.

Almost surely, 2^85471786 is an apocalyptic number.

85471786 is a deficient number, since it is larger than the sum of its proper divisors (42735896).

85471786 is a wasteful number, since it uses less digits than its factorization.

85471786 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42735895.

The product of its digits is 376320, while the sum is 46.

The square root of 85471786 is about 9245.0952401801. The cubic root of 85471786 is about 440.4949423572.

The spelling of 85471786 in words is "eighty-five million, four hundred seventy-one thousand, seven hundred eighty-six".