918973 has 8 divisors (see below), whose sum is σ = 1055520. Its totient is φ = 791280.

The previous prime is 918971. The next prime is 918989. The reversal of 918973 is 379819.

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 918973 - 2¹ = 918971 is a prime.

It is a super-2 number, since 2×918973² = 1689022749458, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

918973 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (918971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1990 + ... + 2407.

It is an arithmetic number, because the mean of its divisors is an integer number (131940).

2⁹¹⁸⁹⁷³ is an apocalyptic number.

It is an amenable number.

918973 is a deficient number, since it is larger than the sum of its proper divisors (136547).

918973 is a wasteful number, since it uses less digits than its factorization.

918973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4427.

The product of its digits is 13608, while the sum is 37.

The square root of 918973 is about 958.6307944146. The cubic root of 918973 is about 97.2226789759. Note that the first 3 decimals are identical.

It can be divided in two parts, 918 and 973, that added together give a triangular number (1891 = T₆₁).

The spelling of 918973 in words is "nine hundred eighteen thousand, nine hundred seventy-three".