861973 has 8 divisors (see below), whose sum is σ = 1037120. Its totient is φ = 699840.

The previous prime is 861947. The next prime is 861977. The reversal of 861973 is 379168.

861973 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 861973 - 2⁵ = 861941 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (861977) 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, 3108 + ... + 3373.

It is an arithmetic number, because the mean of its divisors is an integer number (129640).

2⁸⁶¹⁹⁷³ is an apocalyptic number.

It is an amenable number.

861973 is a deficient number, since it is larger than the sum of its proper divisors (175147).

861973 is a wasteful number, since it uses less digits than its factorization.

861973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6507.

The product of its digits is 9072, while the sum is 34.

The square root of 861973 is about 928.4250104343. The cubic root of 861973 is about 95.1695218797.

The spelling of 861973 in words is "eight hundred sixty-one thousand, nine hundred seventy-three".