679012345 has 16 divisors (see below), whose sum is σ = 912915648. Its totient is φ = 480479040.

The previous prime is 679012333. The next prime is 679012349. The reversal of 679012345 is 543210976.

It is a de Polignac number, because none of the positive numbers 2^k-679012345 is a prime.

It is a super-2 number, since 2×679012345² = 922115529324798050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (679012349) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 164799 + ... + 168868.

It is an arithmetic number, because the mean of its divisors is an integer number (57057228).

Almost surely, 2^679012345 is an apocalyptic number.

It is an amenable number.

679012345 is a deficient number, since it is larger than the sum of its proper divisors (233903303).

679012345 is a wasteful number, since it uses less digits than its factorization.

679012345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333720.

The product of its (nonzero) digits is 45360, while the sum is 37.

The square root of 679012345 is about 26057.8653193235. The cubic root of 679012345 is about 878.9399878698.

The spelling of 679012345 in words is "six hundred seventy-nine million, twelve thousand, three hundred forty-five".