873563903 has 4 divisors (see below), whose sum is σ = 878137728. Its totient is φ = 868990080.

The previous prime is 873563891. The next prime is 873563939. The reversal of 873563903 is 309365378.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-873563903 is a prime.

It is a super-2 number, since 2×873563903² = 1526227785249186818, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (873563953) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2286626 + ... + 2287007.

It is an arithmetic number, because the mean of its divisors is an integer number (219534432).

Almost surely, 2^873563903 is an apocalyptic number.

873563903 is a deficient number, since it is larger than the sum of its proper divisors (4573825).

873563903 is a wasteful number, since it uses less digits than its factorization.

873563903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4573824.

The product of its (nonzero) digits is 408240, while the sum is 44.

The square root of 873563903 is about 29556.1144773801. The cubic root of 873563903 is about 955.9420372851.

The spelling of 873563903 in words is "eight hundred seventy-three million, five hundred sixty-three thousand, nine hundred three".