978005 has 8 divisors (see below), whose sum is σ = 1341312. Its totient is φ = 670608.

The previous prime is 978001. The next prime is 978007. The reversal of 978005 is 500879.

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 978005 - 2² = 978001 is a prime.

It is a Curzon number.

It is a nialpdrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (978001) 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, 13937 + ... + 14006.

It is an arithmetic number, because the mean of its divisors is an integer number (167664).

2⁹⁷⁸⁰⁰⁵ is an apocalyptic number.

It is an amenable number.

978005 is a deficient number, since it is larger than the sum of its proper divisors (363307).

978005 is a wasteful number, since it uses less digits than its factorization.

978005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27955.

The product of its (nonzero) digits is 2520, while the sum is 29.

The square root of 978005 is about 988.9413531651. The cubic root of 978005 is about 99.2613913372.

The spelling of 978005 in words is "nine hundred seventy-eight thousand, five".