679682449 has 4 divisors (see below), whose sum is σ = 680877540. Its totient is φ = 678487360.

The previous prime is 679682447. The next prime is 679682501. The reversal of 679682449 is 944286976.

It is a happy number.

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 158382225 + 521300224 = 12585^2 + 22832^2 .

It is a cyclic number.

It is not a de Polignac number, because 679682449 - 2¹ = 679682447 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 679682449.

It is not an unprimeable number, because it can be changed into a prime (679682447) 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, 596692 + ... + 597829.

It is an arithmetic number, because the mean of its divisors is an integer number (170219385).

Almost surely, 2^679682449 is an apocalyptic number.

It is an amenable number.

679682449 is a deficient number, since it is larger than the sum of its proper divisors (1195091).

679682449 is a wasteful number, since it uses less digits than its factorization.

679682449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1195090.

The product of its digits is 5225472, while the sum is 55.

The square root of 679682449 is about 26070.7201473224. The cubic root of 679682449 is about 879.2290290342.

The spelling of 679682449 in words is "six hundred seventy-nine million, six hundred eighty-two thousand, four hundred forty-nine".