863671825 has 24 divisors (see below), whose sum is σ = 1135608120. Its totient is φ = 649344000.

The previous prime is 863671807. The next prime is 863671829. The reversal of 863671825 is 528176368.

863671825 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 12 ways, for example, as 315737361 + 547934464 = 17769^2 + 23408^2 .

It is not a de Polignac number, because 863671825 - 2⁹ = 863671313 is a prime.

It is not an unprimeable number, because it can be changed into a prime (863671829) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 453375 + ... + 455275.

It is an arithmetic number, because the mean of its divisors is an integer number (47317005).

Almost surely, 2^863671825 is an apocalyptic number.

863671825 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

It is an amenable number.

863671825 is a deficient number, since it is larger than the sum of its proper divisors (271936295).

863671825 is a wasteful number, since it uses less digits than its factorization.

863671825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2997 (or 2992 counting only the distinct ones).

The product of its digits is 483840, while the sum is 46.

The square root of 863671825 is about 29388.2940130930. The cubic root of 863671825 is about 952.3200267107.

The spelling of 863671825 in words is "eight hundred sixty-three million, six hundred seventy-one thousand, eight hundred twenty-five".