2179723489 has 2 divisors, whose sum is σ = 2179723490. Its totient is φ = 2179723488.

The previous prime is 2179723471. The next prime is 2179723517. The reversal of 2179723489 is 9843279712.

2179723489 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2053902400 + 125821089 = 45320^2 + 11217^2 .

It is a cyclic number.

It is not a de Polignac number, because 2179723489 - 2⁵ = 2179723457 is a prime.

It is not a weakly prime, because it can be changed into another prime (2179723439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1089861744 + 1089861745.

It is an arithmetic number, because the mean of its divisors is an integer number (1089861745).

Almost surely, 2^2179723489 is an apocalyptic number.

It is an amenable number.

2179723489 is a deficient number, since it is larger than the sum of its proper divisors (1).

2179723489 is an equidigital number, since it uses as much as digits as its factorization.

2179723489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1524096, while the sum is 52.

The square root of 2179723489 is about 46687.5089183392. The cubic root of 2179723489 is about 1296.5834328303.

The spelling of 2179723489 in words is "two billion, one hundred seventy-nine million, seven hundred twenty-three thousand, four hundred eighty-nine".