285746137 has 4 divisors (see below), whose sum is σ = 292391440. Its totient is φ = 279100836.

The previous prime is 285746119. The next prime is 285746171. The reversal of 285746137 is 731647582.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 731647582 = 2 ⋅365823791.

It is a cyclic number.

It is not a de Polignac number, because 285746137 - 2¹¹ = 285744089 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43), and also a Moran number because the ratio is a prime number: 6645259 = 285746137 / (2 + 8 + 5 + 7 + 4 + 6 + 1 + 3 + 7).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 285746093 and 285746102.

It is not an unprimeable number, because it can be changed into a prime (285746107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3322587 + ... + 3322672.

It is an arithmetic number, because the mean of its divisors is an integer number (73097860).

Almost surely, 2^285746137 is an apocalyptic number.

It is an amenable number.

285746137 is a deficient number, since it is larger than the sum of its proper divisors (6645303).

285746137 is an equidigital number, since it uses as much as digits as its factorization.

285746137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6645302.

The product of its digits is 282240, while the sum is 43.

The square root of 285746137 is about 16904.0272420509. The cubic root of 285746137 is about 658.6582298195.

The spelling of 285746137 in words is "two hundred eighty-five million, seven hundred forty-six thousand, one hundred thirty-seven".