978949 has 8 divisors (see below), whose sum is σ = 1055232. Its totient is φ = 905520.

The previous prime is 978947. The next prime is 978973. The reversal of 978949 is 949879.

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 978949 - 2¹ = 978947 is a prime.

It is a super-2 number, since 2×978949² = 1916682289202, 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 = 978899 and 978908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (978947) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27 + ... + 1399.

It is an arithmetic number, because the mean of its divisors is an integer number (131904).

2⁹⁷⁸⁹⁴⁹ is an apocalyptic number.

It is an amenable number.

978949 is a deficient number, since it is larger than the sum of its proper divisors (76283).

978949 is a wasteful number, since it uses less digits than its factorization.

978949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1427.

The product of its digits is 163296, while the sum is 46.

The square root of 978949 is about 989.4185160992. The cubic root of 978949 is about 99.2933177661.

It can be divided in two parts, 97894 and 9, that added together give a triangular number (97903 = T₄₄₂).

The spelling of 978949 in words is "nine hundred seventy-eight thousand, nine hundred forty-nine".