287353949 has 2 divisors, whose sum is σ = 287353950. Its totient is φ = 287353948.

The previous prime is 287353943. The next prime is 287353999. The reversal of 287353949 is 949353782.

It is a happy number.

It is an a-pointer prime, because the next prime (287353999) can be obtained adding 287353949 to its sum of digits (50).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 267551449 + 19802500 = 16357^2 + 4450^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-287353949 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 287353897 and 287353906.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (287353943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 143676974 + 143676975.

It is an arithmetic number, because the mean of its divisors is an integer number (143676975).

Almost surely, 2^287353949 is an apocalyptic number.

It is an amenable number.

287353949 is a deficient number, since it is larger than the sum of its proper divisors (1).

287353949 is an equidigital number, since it uses as much as digits as its factorization.

287353949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1632960, while the sum is 50.

The square root of 287353949 is about 16951.5176016780. The cubic root of 287353949 is about 659.8912806840.

The spelling of 287353949 in words is "two hundred eighty-seven million, three hundred fifty-three thousand, nine hundred forty-nine".