285727197 has 16 divisors (see below), whose sum is σ = 435630080. Its totient is φ = 163184112.

The previous prime is 285727181. The next prime is 285727213. The reversal of 285727197 is 791727582.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (285727181) and next prime (285727213).

It is not a de Polignac number, because 285727197 - 2⁴ = 285727181 is a prime.

It is a super-2 number, since 2×285727197² = 163280062210953618, which contains 22 as substring.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (285727157) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 72828 + ... + 76650.

It is an arithmetic number, because the mean of its divisors is an integer number (27226880).

Almost surely, 2^285727197 is an apocalyptic number.

It is an amenable number.

285727197 is a deficient number, since it is larger than the sum of its proper divisors (149902883).

285727197 is a wasteful number, since it uses less digits than its factorization.

285727197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7392.

The product of its digits is 493920, while the sum is 48.

The square root of 285727197 is about 16903.4670112377. The cubic root of 285727197 is about 658.6436769689.

The spelling of 285727197 in words is "two hundred eighty-five million, seven hundred twenty-seven thousand, one hundred ninety-seven".