679488489 has 9 divisors (see below), whose sum is σ = 981596343. Its totient is φ = 452940192.

The previous prime is 679488463. The next prime is 679488493. The reversal of 679488489 is 984884976.

The square root of 679488489 is 26067.

It is a perfect power (a square), and thus also a powerful number.

679488489 is a `hidden beast` number, since 6 + 79 + 4 + 88 + 489 = 666.

It can be written as a sum of positive squares in only one way, i.e., 610930089 + 68558400 = 24717^2 + 8280^2 .

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 679488489 - 2¹¹ = 679486441 is a prime.

It is not an unprimeable number, because it can be changed into a prime (679488409) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 73857 + ... + 82545.

Almost surely, 2^679488489 is an apocalyptic number.

679488489 is the 26067-th square number.

679488489 is the 13034-th centered octagonal number.

It is an amenable number.

679488489 is a deficient number, since it is larger than the sum of its proper divisors (302107854).

679488489 is an frugal number, since it uses more digits than its factorization.

679488489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17384 (or 8692 counting only the distinct ones).

The product of its digits is 27869184, while the sum is 63.

The cubic root of 679488489 is about 879.1453863041.

The spelling of 679488489 in words is "six hundred seventy-nine million, four hundred eighty-eight thousand, four hundred eighty-nine".