2179345439 has 2 divisors, whose sum is σ = 2179345440. Its totient is φ = 2179345438.

The previous prime is 2179345433. The next prime is 2179345453. The reversal of 2179345439 is 9345439712.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2179345439 - 2²⁰ = 2178296863 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2179345393 and 2179345402.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2179345433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1089672719 + 1089672720.

It is an arithmetic number, because the mean of its divisors is an integer number (1089672720).

Almost surely, 2^2179345439 is an apocalyptic number.

2179345439 is a deficient number, since it is larger than the sum of its proper divisors (1).

2179345439 is an equidigital number, since it uses as much as digits as its factorization.

2179345439 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 816480, while the sum is 47.

The square root of 2179345439 is about 46683.4600152988. The cubic root of 2179345439 is about 1296.5084689323.

The spelling of 2179345439 in words is "two billion, one hundred seventy-nine million, three hundred forty-five thousand, four hundred thirty-nine".