287925781049 has 2 divisors, whose sum is σ = 287925781050. Its totient is φ = 287925781048.

The previous prime is 287925781027. The next prime is 287925781093. The reversal of 287925781049 is 940187529782.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 176373121024 + 111552660025 = 419968^2 + 333995^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-287925781049 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 287925780982 and 287925781000.

It is not a weakly prime, because it can be changed into another prime (287925781019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 143962890524 + 143962890525.

It is an arithmetic number, because the mean of its divisors is an integer number (143962890525).

Almost surely, 2^287925781049 is an apocalyptic number.

It is an amenable number.

287925781049 is a deficient number, since it is larger than the sum of its proper divisors (1).

287925781049 is an equidigital number, since it uses as much as digits as its factorization.

287925781049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20321280, while the sum is 62.

The spelling of 287925781049 in words is "two hundred eighty-seven billion, nine hundred twenty-five million, seven hundred eighty-one thousand, forty-nine".