287353897 has 2 divisors, whose sum is σ = 287353898. Its totient is φ = 287353896.

The previous prime is 287353879. The next prime is 287353901. The reversal of 287353897 is 798353782.

Together with previous prime (287353879) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 194212096 + 93141801 = 13936^2 + 9651^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-287353897 is a prime.

It is not a weakly prime, because it can be changed into another prime (287356897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 143676948 + 143676949.

It is an arithmetic number, because the mean of its divisors is an integer number (143676949).

Almost surely, 2^287353897 is an apocalyptic number.

It is an amenable number.

287353897 is a deficient number, since it is larger than the sum of its proper divisors (1).

287353897 is an equidigital number, since it uses as much as digits as its factorization.

287353897 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2540160, while the sum is 52.

The square root of 287353897 is about 16951.5160678920. The cubic root of 287353897 is about 659.8912408791.

The spelling of 287353897 in words is "two hundred eighty-seven million, three hundred fifty-three thousand, eight hundred ninety-seven".