980639 has 8 divisors (see below), whose sum is σ = 1088640. Its totient is φ = 875800.

The previous prime is 980621. The next prime is 980641. The reversal of 980639 is 936089.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-980639 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 980599 and 980608.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 980639.

It is not an unprimeable number, because it can be changed into a prime (980689) 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, 107 + ... + 1404.

It is an arithmetic number, because the mean of its divisors is an integer number (136080).

2⁹⁸⁰⁶³⁹ is an apocalyptic number.

980639 is a deficient number, since it is larger than the sum of its proper divisors (108001).

980639 is a wasteful number, since it uses less digits than its factorization.

980639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1581.

The product of its (nonzero) digits is 11664, while the sum is 35.

The square root of 980639 is about 990.2721848058. The cubic root of 980639 is about 99.3504229664.

The spelling of 980639 in words is "nine hundred eighty thousand, six hundred thirty-nine".