978479 has 2 divisors, whose sum is σ = 978480. Its totient is φ = 978478.

The previous prime is 978473. The next prime is 978491. The reversal of 978479 is 974879.

It is a weak prime.

It is an emirp because it is prime and its reverse (974879) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 978479 - 2⁴ = 978463 is a prime.

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 978479.

It is not a weakly prime, because it can be changed into another prime (978473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 489239 + 489240.

It is an arithmetic number, because the mean of its divisors is an integer number (489240).

2⁹⁷⁸⁴⁷⁹ is an apocalyptic number.

978479 is a deficient number, since it is larger than the sum of its proper divisors (1).

978479 is an equidigital number, since it uses as much as digits as its factorization.

978479 is an evil number, because the sum of its binary digits is even.

The product of its digits is 127008, while the sum is 44.

The square root of 978479 is about 989.1809743419. The cubic root of 978479 is about 99.2774247591.

Subtracting from 978479 its reverse (974879), we obtain a square (3600 = 60²).

The spelling of 978479 in words is "nine hundred seventy-eight thousand, four hundred seventy-nine".