679307245 has 8 divisors (see below), whose sum is σ = 815882616. Its totient is φ = 542969856.

The previous prime is 679307243. The next prime is 679307263. The reversal of 679307245 is 542703976.

It can be written as a sum of positive squares in 4 ways, for example, as 10929636 + 668377609 = 3306^2 + 25853^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 679307245 - 2¹ = 679307243 is a prime.

It is a super-2 number, since 2×679307245² = 922916666218980050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (679307243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53152 + ... + 64681.

It is an arithmetic number, because the mean of its divisors is an integer number (101985327).

Almost surely, 2^679307245 is an apocalyptic number.

It is an amenable number.

679307245 is a deficient number, since it is larger than the sum of its proper divisors (136575371).

679307245 is a wasteful number, since it uses less digits than its factorization.

679307245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118991.

The product of its (nonzero) digits is 317520, while the sum is 43.

The square root of 679307245 is about 26063.5232652840. The cubic root of 679307245 is about 879.0672127965.

The spelling of 679307245 in words is "six hundred seventy-nine million, three hundred seven thousand, two hundred forty-five".