285274609 has 4 divisors (see below), whose sum is σ = 288885760. Its totient is φ = 281663460.

The previous prime is 285274579. The next prime is 285274621. The reversal of 285274609 is 906472582.

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: 906472582 = 2 ⋅453236291.

It is a cyclic number.

It is not a de Polignac number, because 285274609 - 2²¹ = 283177457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (285274669) 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, 1805457 + ... + 1805614.

It is an arithmetic number, because the mean of its divisors is an integer number (72221440).

Almost surely, 2^285274609 is an apocalyptic number.

It is an amenable number.

285274609 is a deficient number, since it is larger than the sum of its proper divisors (3611151).

285274609 is an equidigital number, since it uses as much as digits as its factorization.

285274609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3611150.

The product of its (nonzero) digits is 241920, while the sum is 43.

The square root of 285274609 is about 16890.0742745555. The cubic root of 285274609 is about 658.2957323109.

The spelling of 285274609 in words is "two hundred eighty-five million, two hundred seventy-four thousand, six hundred nine".