1012345679 has 8 divisors (see below), whose sum is σ = 1028611248. Its totient is φ = 996114240.

The previous prime is 1012345661. The next prime is 1012345693. The reversal of 1012345679 is 9765432101.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1012345679 is a prime.

It is a Duffinian number.

1012345679 is a modest number, since divided by 12345679 gives 1 as remainder.

It is the 79-th primeval number, because it sets a new record (347987) in the number of distinct primes that is it possible to write using its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1012345639) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55019 + ... + 71075.

It is an arithmetic number, because the mean of its divisors is an integer number (128576406).

Almost surely, 2^1012345679 is an apocalyptic number.

1012345679 is a deficient number, since it is larger than the sum of its proper divisors (16265569).

1012345679 is an equidigital number, since it uses as much as digits as its factorization.

1012345679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17065.

The product of its (nonzero) digits is 45360, while the sum is 38.

The square root of 1012345679 is about 31817.3801404201. The cubic root of 1012345679 is about 1004.0984064510.

The spelling of 1012345679 in words is "one billion, twelve million, three hundred forty-five thousand, six hundred seventy-nine".