978131 has 8 divisors (see below), whose sum is σ = 1219584. Its totient is φ = 762120.

The previous prime is 978113. The next prime is 978149. The reversal of 978131 is 131879.

It is an interprime number because it is at equal distance from previous prime (978113) and next prime (978149).

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 978131 - 2⁶ = 978067 is a prime.

It is a super-2 number, since 2×978131² = 1913480506322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 978094 and 978103.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 978131.

It is not an unprimeable number, because it can be changed into a prime (978151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6275 + ... + 6428.

It is an arithmetic number, because the mean of its divisors is an integer number (152448).

2⁹⁷⁸¹³¹ is an apocalyptic number.

978131 is a deficient number, since it is larger than the sum of its proper divisors (241453).

978131 is a wasteful number, since it uses less digits than its factorization.

978131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12721.

The product of its digits is 1512, while the sum is 29.

The square root of 978131 is about 989.0050555988. The cubic root of 978131 is about 99.2656538915.

It can be divided in two parts, 97 and 8131, that added together give a palindrome (8228).

The spelling of 978131 in words is "nine hundred seventy-eight thousand, one hundred thirty-one".