287031161 has 2 divisors, whose sum is σ = 287031162. Its totient is φ = 287031160.

The previous prime is 287031131. The next prime is 287031197. The reversal of 287031161 is 161130782.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 286117225 + 913936 = 16915^2 + 956^2 .

It is a cyclic number.

It is not a de Polignac number, because 287031161 - 2⁶ = 287031097 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (287031131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 143515580 + 143515581.

It is an arithmetic number, because the mean of its divisors is an integer number (143515581).

Almost surely, 2^287031161 is an apocalyptic number.

It is an amenable number.

287031161 is a deficient number, since it is larger than the sum of its proper divisors (1).

287031161 is an equidigital number, since it uses as much as digits as its factorization.

287031161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2016, while the sum is 29.

The square root of 287031161 is about 16941.9940089707. The cubic root of 287031161 is about 659.6441002825.

The spelling of 287031161 in words is "two hundred eighty-seven million, thirty-one thousand, one hundred sixty-one".