978249 has 4 divisors (see below), whose sum is σ = 1304336. Its totient is φ = 652164.

The previous prime is 978239. The next prime is 978269. The reversal of 978249 is 942879.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 978249 - 2⁴ = 978233 is a prime.

It is a super-2 number, since 2×978249² = 1913942212002, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (978209) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 163039 + ... + 163044.

It is an arithmetic number, because the mean of its divisors is an integer number (326084).

2⁹⁷⁸²⁴⁹ is an apocalyptic number.

It is an amenable number.

978249 is a deficient number, since it is larger than the sum of its proper divisors (326087).

978249 is a wasteful number, since it uses less digits than its factorization.

978249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 326086.

The product of its digits is 36288, while the sum is 39.

The square root of 978249 is about 989.0647097132. The cubic root of 978249 is about 99.2696454755.

The spelling of 978249 in words is "nine hundred seventy-eight thousand, two hundred forty-nine".