978231 has 8 divisors (see below), whose sum is σ = 1381104. Its totient is φ = 613760.

The previous prime is 978223. The next prime is 978233. The reversal of 978231 is 132879.

It is a happy number.

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 978231 - 2³ = 978223 is a prime.

It is a super-2 number, since 2×978231² = 1913871778722, which contains 22 as substring.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (978233) by changing a digit.

It is an upside-down number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9540 + ... + 9641.

It is an arithmetic number, because the mean of its divisors is an integer number (172638).

2⁹⁷⁸²³¹ is an apocalyptic number.

978231 is a deficient number, since it is larger than the sum of its proper divisors (402873).

978231 is a wasteful number, since it uses less digits than its factorization.

978231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19201.

The product of its digits is 3024, while the sum is 30.

The square root of 978231 is about 989.0556101656. The cubic root of 978231 is about 99.2690366105.

The spelling of 978231 in words is "nine hundred seventy-eight thousand, two hundred thirty-one".