287601161 has 4 divisors (see below), whose sum is σ = 293027652. Its totient is φ = 282174672.

The previous prime is 287601151. The next prime is 287601169. The reversal of 287601161 is 161106782.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 74995600 + 212605561 = 8660^2 + 14581^2 .

It is a cyclic number.

It is not a de Polignac number, because 287601161 - 2¹⁴ = 287584777 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (287601169) 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, 2713166 + ... + 2713271.

It is an arithmetic number, because the mean of its divisors is an integer number (73256913).

Almost surely, 2^287601161 is an apocalyptic number.

It is an amenable number.

287601161 is a deficient number, since it is larger than the sum of its proper divisors (5426491).

287601161 is an equidigital number, since it uses as much as digits as its factorization.

287601161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5426490.

The product of its (nonzero) digits is 4032, while the sum is 32.

The square root of 287601161 is about 16958.8077705952. The cubic root of 287601161 is about 660.0804623359.

The spelling of 287601161 in words is "two hundred eighty-seven million, six hundred one thousand, one hundred sixty-one".