978569 has 2 divisors, whose sum is σ = 978570. Its totient is φ = 978568.

The previous prime is 978541. The next prime is 978599. The reversal of 978569 is 965879.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 659344 + 319225 = 812^2 + 565^2 .

It is a cyclic number.

It is not a de Polignac number, because 978569 - 2¹² = 974473 is a prime.

It is a super-2 number, since 2×978569² = 1915194575522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (978599) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 489284 + 489285.

It is an arithmetic number, because the mean of its divisors is an integer number (489285).

2⁹⁷⁸⁵⁶⁹ is an apocalyptic number.

It is an amenable number.

978569 is a deficient number, since it is larger than the sum of its proper divisors (1).

978569 is an equidigital number, since it uses as much as digits as its factorization.

978569 is an evil number, because the sum of its binary digits is even.

The product of its digits is 136080, while the sum is 44.

The square root of 978569 is about 989.2264654769. The cubic root of 978569 is about 99.2804684948.

The spelling of 978569 in words is "nine hundred seventy-eight thousand, five hundred sixty-nine".