971878 has 8 divisors (see below), whose sum is σ = 1468872. Its totient is φ = 482256.

The previous prime is 971863. The next prime is 971899. The reversal of 971878 is 878179.

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

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 971878.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1500 + ... + 2047.

It is an arithmetic number, because the mean of its divisors is an integer number (183609).

2⁹⁷¹⁸⁷⁸ is an apocalyptic number.

971878 is a deficient number, since it is larger than the sum of its proper divisors (496994).

971878 is a wasteful number, since it uses less digits than its factorization.

971878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3686.

The product of its digits is 28224, while the sum is 40.

The square root of 971878 is about 985.8387292047. The cubic root of 971878 is about 99.0536728991.

It can be divided in two parts, 971 and 878, that added together give a square (1849 = 43²).

The spelling of 971878 in words is "nine hundred seventy-one thousand, eight hundred seventy-eight".