4012345679 has 4 divisors (see below), whose sum is σ = 4097714784. Its totient is φ = 3926976576.

The previous prime is 4012345657. The next prime is 4012345697. The reversal of 4012345679 is 9765432104.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4012345679 is a prime.

It is a Duffinian number.

4012345679 is a modest number, since divided by 12345679 gives 4 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4012345619) 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 3 ways as a sum of consecutive naturals, for example, 42684482 + ... + 42684575.

It is an arithmetic number, because the mean of its divisors is an integer number (1024428696).

Almost surely, 2^4012345679 is an apocalyptic number.

4012345679 is a deficient number, since it is larger than the sum of its proper divisors (85369105).

4012345679 is an equidigital number, since it uses as much as digits as its factorization.

4012345679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85369104.

The product of its (nonzero) digits is 181440, while the sum is 41.

The square root of 4012345679 is about 63343.0791720769. The cubic root of 4012345679 is about 1589.0325033224.

The spelling of 4012345679 in words is "four billion, twelve million, three hundred forty-five thousand, six hundred seventy-nine".