863909073 has 12 divisors (see below), whose sum is σ = 1278305028. Its totient is φ = 561891840.

The previous prime is 863909051. The next prime is 863909089. The reversal of 863909073 is 370909368.

It is a happy number.

863909073 is a `hidden beast` number, since 8 + 639 + 0 + 9 + 0 + 7 + 3 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 423412929 + 440496144 = 20577^2 + 20988^2 .

It is not a de Polignac number, because 863909073 - 2⁸ = 863908817 is a prime.

It is not an unprimeable number, because it can be changed into a prime (863909873) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1170240 + ... + 1170977.

It is an arithmetic number, because the mean of its divisors is an integer number (106525419).

Almost surely, 2^863909073 is an apocalyptic number.

It is an amenable number.

863909073 is a deficient number, since it is larger than the sum of its proper divisors (414395955).

863909073 is a wasteful number, since it uses less digits than its factorization.

863909073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2341264 (or 2341261 counting only the distinct ones).

The product of its (nonzero) digits is 244944, while the sum is 45.

The square root of 863909073 is about 29392.3301730230. The cubic root of 863909073 is about 952.4072185237.

The spelling of 863909073 in words is "eight hundred sixty-three million, nine hundred nine thousand, seventy-three".