287199161 has 2 divisors, whose sum is σ = 287199162. Its totient is φ = 287199160.

The previous prime is 287199149. The next prime is 287199179. The reversal of 287199161 is 161991782.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 197233936 + 89965225 = 14044^2 + 9485^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-287199161 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (287199181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 143599580 + 143599581.

It is an arithmetic number, because the mean of its divisors is an integer number (143599581).

Almost surely, 2^287199161 is an apocalyptic number.

It is an amenable number.

287199161 is a deficient number, since it is larger than the sum of its proper divisors (1).

287199161 is an equidigital number, since it uses as much as digits as its factorization.

287199161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54432, while the sum is 44.

The square root of 287199161 is about 16946.9513777552. The cubic root of 287199161 is about 659.7727722524.

The spelling of 287199161 in words is "two hundred eighty-seven million, one hundred ninety-nine thousand, one hundred sixty-one".