971918 has 4 divisors (see below), whose sum is σ = 1457880. Its totient is φ = 485958.

The previous prime is 971917. The next prime is 971921. The reversal of 971918 is 819179.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 819179 = 17 ⋅48187.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 971918.

It is not an unprimeable number, because it can be changed into a prime (971917) 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 as a sum of consecutive naturals, namely, 242978 + ... + 242981.

It is an arithmetic number, because the mean of its divisors is an integer number (364470).

2⁹⁷¹⁹¹⁸ is an apocalyptic number.

971918 is a deficient number, since it is larger than the sum of its proper divisors (485962).

971918 is a wasteful number, since it uses less digits than its factorization.

971918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 485961.

The product of its digits is 4536, while the sum is 35.

The square root of 971918 is about 985.8590162899. The cubic root of 971918 is about 99.0550318120.

The spelling of 971918 in words is "nine hundred seventy-one thousand, nine hundred eighteen".