287148689 has 2 divisors, whose sum is σ = 287148690. Its totient is φ = 287148688.

The previous prime is 287148677. The next prime is 287148703. The reversal of 287148689 is 986841782.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 285339664 + 1809025 = 16892^2 + 1345^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-287148689 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 287148689.

It is not a weakly prime, because it can be changed into another prime (287148889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 143574344 + 143574345.

It is an arithmetic number, because the mean of its divisors is an integer number (143574345).

Almost surely, 2^287148689 is an apocalyptic number.

It is an amenable number.

287148689 is a deficient number, since it is larger than the sum of its proper divisors (1).

287148689 is an equidigital number, since it uses as much as digits as its factorization.

287148689 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1548288, while the sum is 53.

The square root of 287148689 is about 16945.4621949358. The cubic root of 287148689 is about 659.7341207906.

The spelling of 287148689 in words is "two hundred eighty-seven million, one hundred forty-eight thousand, six hundred eighty-nine".