679024681 has 4 divisors (see below), whose sum is σ = 679178500. Its totient is φ = 678870864.

The previous prime is 679024669. The next prime is 679024741. The reversal of 679024681 is 186420976.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 445210000 + 233814681 = 21100^2 + 15291^2 .

It is a cyclic number.

It is not a de Polignac number, because 679024681 - 2¹⁷ = 678893609 is a prime.

It is a super-2 number, since 2×679024681² = 922149034814303522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (679024601) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70086 + ... + 79183.

It is an arithmetic number, because the mean of its divisors is an integer number (169794625).

Almost surely, 2^679024681 is an apocalyptic number.

It is an amenable number.

679024681 is a deficient number, since it is larger than the sum of its proper divisors (153819).

679024681 is a wasteful number, since it uses less digits than its factorization.

679024681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153818.

The product of its (nonzero) digits is 145152, while the sum is 43.

The square root of 679024681 is about 26058.1020222118. The cubic root of 679024681 is about 878.9453105703.

The spelling of 679024681 in words is "six hundred seventy-nine million, twenty-four thousand, six hundred eighty-one".