861873803 has 8 divisors (see below), whose sum is σ = 1042939872. Its totient is φ = 695293056.

The previous prime is 861873799. The next prime is 861873847. The reversal of 861873803 is 308378168.

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 861873803 - 2² = 861873799 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (861873853) 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 7 ways as a sum of consecutive naturals, for example, 3621200 + ... + 3621437.

It is an arithmetic number, because the mean of its divisors is an integer number (130367484).

Almost surely, 2^861873803 is an apocalyptic number.

861873803 is a deficient number, since it is larger than the sum of its proper divisors (181066069).

861873803 is a wasteful number, since it uses less digits than its factorization.

861873803 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7242661.

The product of its (nonzero) digits is 193536, while the sum is 44.

The square root of 861873803 is about 29357.6872897032. The cubic root of 861873803 is about 951.6587099457.

The spelling of 861873803 in words is "eight hundred sixty-one million, eight hundred seventy-three thousand, eight hundred three".