285164137 has 4 divisors (see below), whose sum is σ = 301938516. Its totient is φ = 268389760.

The previous prime is 285164129. The next prime is 285164147. The reversal of 285164137 is 731461582.

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

It can be written as a sum of positive squares in 2 ways, for example, as 107101801 + 178062336 = 10349^2 + 13344^2 .

It is a cyclic number.

It is not a de Polignac number, because 285164137 - 2³ = 285164129 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 285164096 and 285164105.

It is not an unprimeable number, because it can be changed into a prime (285164147) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8387164 + ... + 8387197.

It is an arithmetic number, because the mean of its divisors is an integer number (75484629).

Almost surely, 2^285164137 is an apocalyptic number.

It is an amenable number.

285164137 is a deficient number, since it is larger than the sum of its proper divisors (16774379).

285164137 is a wasteful number, since it uses less digits than its factorization.

285164137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16774378.

The product of its digits is 40320, while the sum is 37.

The square root of 285164137 is about 16886.8036347913. The cubic root of 285164137 is about 658.2107467880.

The spelling of 285164137 in words is "two hundred eighty-five million, one hundred sixty-four thousand, one hundred thirty-seven".