2161294679 has 4 divisors (see below), whose sum is σ = 2161411560. Its totient is φ = 2161177800.

The previous prime is 2161294637. The next prime is 2161294697. The reversal of 2161294679 is 9764921612.

2161294679 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 2161294679 - 2¹⁶ = 2161229143 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2161294279) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23897 + ... + 69954.

It is an arithmetic number, because the mean of its divisors is an integer number (540352890).

Almost surely, 2^2161294679 is an apocalyptic number.

2161294679 is a deficient number, since it is larger than the sum of its proper divisors (116881).

2161294679 is an equidigital number, since it uses as much as digits as its factorization.

2161294679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116880.

The product of its digits is 326592, while the sum is 47.

The square root of 2161294679 is about 46489.7265963137. The cubic root of 2161294679 is about 1292.9190310788.

The spelling of 2161294679 in words is "two billion, one hundred sixty-one million, two hundred ninety-four thousand, six hundred seventy-nine".