285697109 has 8 divisors (see below), whose sum is σ = 290012352. Its totient is φ = 281413440.

The previous prime is 285697103. The next prime is 285697141. The reversal of 285697109 is 901796582.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 285697109 - 2¹² = 285693013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (285697103) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10664 + ... + 26174.

It is an arithmetic number, because the mean of its divisors is an integer number (36251544).

Almost surely, 2^285697109 is an apocalyptic number.

It is an amenable number.

285697109 is a deficient number, since it is larger than the sum of its proper divisors (4315243).

285697109 is a wasteful number, since it uses less digits than its factorization.

285697109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15787.

The product of its (nonzero) digits is 272160, while the sum is 47.

The square root of 285697109 is about 16902.5769928730. The cubic root of 285697109 is about 658.6205570527.

The spelling of 285697109 in words is "two hundred eighty-five million, six hundred ninety-seven thousand, one hundred nine".