865905249 has 8 divisors (see below), whose sum is σ = 1259498592. Its totient is φ = 524791040.

The previous prime is 865905247. The next prime is 865905263. The reversal of 865905249 is 942509568.

865905249 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 865905249 - 2¹ = 865905247 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 865905198 and 865905207.

It is not an unprimeable number, because it can be changed into a prime (865905247) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13119744 + ... + 13119809.

It is an arithmetic number, because the mean of its divisors is an integer number (157437324).

Almost surely, 2^865905249 is an apocalyptic number.

It is an amenable number.

865905249 is a deficient number, since it is larger than the sum of its proper divisors (393593343).

865905249 is a wasteful number, since it uses less digits than its factorization.

865905249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26239567.

The product of its (nonzero) digits is 777600, while the sum is 48.

The square root of 865905249 is about 29426.2680100620. The cubic root of 865905249 is about 953.1402084740.

The spelling of 865905249 in words is "eight hundred sixty-five million, nine hundred five thousand, two hundred forty-nine".