285001897 has 4 divisors (see below), whose sum is σ = 287177616. Its totient is φ = 282826180.

The previous prime is 285001891. The next prime is 285001903. The reversal of 285001897 is 798100582.

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.

It is an interprime number because it is at equal distance from previous prime (285001891) and next prime (285001903).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-285001897 is a prime.

It is a Smith number, since the sum of its digits (40) 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 not an unprimeable number, because it can be changed into a prime (285001891) 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, 1087663 + ... + 1087924.

It is an arithmetic number, because the mean of its divisors is an integer number (71794404).

Almost surely, 2^285001897 is an apocalyptic number.

It is an amenable number.

285001897 is a deficient number, since it is larger than the sum of its proper divisors (2175719).

285001897 is a wasteful number, since it uses less digits than its factorization.

285001897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2175718.

The product of its (nonzero) digits is 40320, while the sum is 40.

The square root of 285001897 is about 16881.9992003317. Note that the first 3 decimals coincide. The cubic root of 285001897 is about 658.0858966217.

The spelling of 285001897 in words is "two hundred eighty-five million, one thousand, eight hundred ninety-seven".