287328497 has 2 divisors, whose sum is σ = 287328498. Its totient is φ = 287328496.

The previous prime is 287328493. The next prime is 287328521. The reversal of 287328497 is 794823782.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 159163456 + 128165041 = 12616^2 + 11321^2 .

It is a cyclic number.

It is not a de Polignac number, because 287328497 - 2² = 287328493 is a prime.

It is not a weakly prime, because it can be changed into another prime (287328493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 143664248 + 143664249.

It is an arithmetic number, because the mean of its divisors is an integer number (143664249).

Almost surely, 2^287328497 is an apocalyptic number.

It is an amenable number.

287328497 is a deficient number, since it is larger than the sum of its proper divisors (1).

287328497 is an equidigital number, since it uses as much as digits as its factorization.

287328497 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1354752, while the sum is 50.

The square root of 287328497 is about 16950.7668558092. The cubic root of 287328497 is about 659.8717971066.

The spelling of 287328497 in words is "two hundred eighty-seven million, three hundred twenty-eight thousand, four hundred ninety-seven".