2179120939 has 2 divisors, whose sum is σ = 2179120940. Its totient is φ = 2179120938.

The previous prime is 2179120919. The next prime is 2179120967. The reversal of 2179120939 is 9390219712.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2179120939 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2179120895 and 2179120904.

It is not a weakly prime, because it can be changed into another prime (2179120919) 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 as a sum of consecutive naturals, namely, 1089560469 + 1089560470.

It is an arithmetic number, because the mean of its divisors is an integer number (1089560470).

Almost surely, 2^2179120939 is an apocalyptic number.

2179120939 is a deficient number, since it is larger than the sum of its proper divisors (1).

2179120939 is an equidigital number, since it uses as much as digits as its factorization.

2179120939 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 61236, while the sum is 43.

The square root of 2179120939 is about 46681.0554615039. The cubic root of 2179120939 is about 1296.4639485087.

The spelling of 2179120939 in words is "two billion, one hundred seventy-nine million, one hundred twenty thousand, nine hundred thirty-nine".