861355873 has 8 divisors (see below), whose sum is σ = 985287680. Its totient is φ = 737644320.

The previous prime is 861355871. The next prime is 861355877. The reversal of 861355873 is 378553168.

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

It is not a de Polignac number, because 861355873 - 2¹ = 861355871 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (861355871) 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, 46593 + ... + 62398.

It is an arithmetic number, because the mean of its divisors is an integer number (123160960).

Almost surely, 2^861355873 is an apocalyptic number.

It is an amenable number.

861355873 is a deficient number, since it is larger than the sum of its proper divisors (123931807).

861355873 is a wasteful number, since it uses less digits than its factorization.

861355873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110127.

The product of its digits is 604800, while the sum is 46.

The square root of 861355873 is about 29348.8649354622. The cubic root of 861355873 is about 951.4680434549.

The spelling of 861355873 in words is "eight hundred sixty-one million, three hundred fifty-five thousand, eight hundred seventy-three".