287993729 has 2 divisors, whose sum is σ = 287993730. Its totient is φ = 287993728.

The previous prime is 287993707. The next prime is 287993731. The reversal of 287993729 is 927399782.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 273968704 + 14025025 = 16552^2 + 3745^2 .

It is a cyclic number.

It is not a de Polignac number, because 287993729 - 2²⁴ = 271216513 is a prime.

Together with 287993731, 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 (287993129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 143996864 + 143996865.

It is an arithmetic number, because the mean of its divisors is an integer number (143996865).

Almost surely, 2^287993729 is an apocalyptic number.

It is an amenable number.

287993729 is a deficient number, since it is larger than the sum of its proper divisors (1).

287993729 is an equidigital number, since it uses as much as digits as its factorization.

287993729 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3429216, while the sum is 56.

The square root of 287993729 is about 16970.3779863620. The cubic root of 287993729 is about 660.3806565993.

The spelling of 287993729 in words is "two hundred eighty-seven million, nine hundred ninety-three thousand, seven hundred twenty-nine".