1213879679 has 8 divisors (see below), whose sum is σ = 1326745728. Its totient is φ = 1105620480.

The previous prime is 1213879663. The next prime is 1213879691. The reversal of 1213879679 is 9769783121.

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 1213879679 - 2⁴ = 1213879663 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 1213879679.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213873679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1151162 + ... + 1152215.

It is an arithmetic number, because the mean of its divisors is an integer number (165843216).

Almost surely, 2^1213879679 is an apocalyptic number.

1213879679 is a deficient number, since it is larger than the sum of its proper divisors (112866049).

1213879679 is a wasteful number, since it uses less digits than its factorization.

1213879679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2303425.

The product of its digits is 1143072, while the sum is 53.

The square root of 1213879679 is about 34840.7760964075. The cubic root of 1213879679 is about 1066.7399182876.

The spelling of 1213879679 in words is "one billion, two hundred thirteen million, eight hundred seventy-nine thousand, six hundred seventy-nine".