287870057 has 2 divisors, whose sum is σ = 287870058. Its totient is φ = 287870056.

The previous prime is 287869987. The next prime is 287870059. The reversal of 287870057 is 750078782.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 245736976 + 42133081 = 15676^2 + 6491^2 .

It is a cyclic number.

It is not a de Polignac number, because 287870057 - 2¹⁶ = 287804521 is a prime.

Together with 287870059, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (287870059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 143935028 + 143935029.

It is an arithmetic number, because the mean of its divisors is an integer number (143935029).

Almost surely, 2^287870057 is an apocalyptic number.

It is an amenable number.

287870057 is a deficient number, since it is larger than the sum of its proper divisors (1).

287870057 is an equidigital number, since it uses as much as digits as its factorization.

287870057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 219520, while the sum is 44.

The square root of 287870057 is about 16966.7338341827. The cubic root of 287870057 is about 660.2861148534.

The spelling of 287870057 in words is "two hundred eighty-seven million, eight hundred seventy thousand, fifty-seven".