287173961 has 4 divisors (see below), whose sum is σ = 302288400. Its totient is φ = 272059524.

The previous prime is 287173937. The next prime is 287173973. The reversal of 287173961 is 169371782.

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 a cyclic number.

It is not a de Polignac number, because 287173961 - 2¹⁰ = 287172937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (287179961) 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, 7557191 + ... + 7557228.

It is an arithmetic number, because the mean of its divisors is an integer number (75572100).

Almost surely, 2^287173961 is an apocalyptic number.

It is an amenable number.

287173961 is a deficient number, since it is larger than the sum of its proper divisors (15114439).

287173961 is a wasteful number, since it uses less digits than its factorization.

287173961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15114438.

The product of its digits is 127008, while the sum is 44.

The square root of 287173961 is about 16946.2078648882. The cubic root of 287173961 is about 659.7534746564.

The spelling of 287173961 in words is "two hundred eighty-seven million, one hundred seventy-three thousand, nine hundred sixty-one".