855907249 has 2 divisors, whose sum is σ = 855907250. Its totient is φ = 855907248.

The previous prime is 855907243. The next prime is 855907253. The reversal of 855907249 is 942709558.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 815673600 + 40233649 = 28560^2 + 6343^2 .

It is a cyclic number.

It is not a de Polignac number, because 855907249 - 2⁷ = 855907121 is a prime.

It is not a weakly prime, because it can be changed into another prime (855907243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 427953624 + 427953625.

It is an arithmetic number, because the mean of its divisors is an integer number (427953625).

Almost surely, 2^855907249 is an apocalyptic number.

It is an amenable number.

855907249 is a deficient number, since it is larger than the sum of its proper divisors (1).

855907249 is an equidigital number, since it uses as much as digits as its factorization.

855907249 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 907200, while the sum is 49.

The square root of 855907249 is about 29255.8925517578. The cubic root of 855907249 is about 949.4575847271.

The spelling of 855907249 in words is "eight hundred fifty-five million, nine hundred seven thousand, two hundred forty-nine".