2421205979 has 2 divisors, whose sum is σ = 2421205980. Its totient is φ = 2421205978.

The previous prime is 2421205957. The next prime is 2421205981. The reversal of 2421205979 is 9795021242.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2421205979 - 2¹⁶ = 2421140443 is a prime.

Together with 2421205981, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2421205939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1210602989 + 1210602990.

It is an arithmetic number, because the mean of its divisors is an integer number (1210602990).

Almost surely, 2^2421205979 is an apocalyptic number.

2421205979 is a deficient number, since it is larger than the sum of its proper divisors (1).

2421205979 is an equidigital number, since it uses as much as digits as its factorization.

2421205979 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 90720, while the sum is 41.

The square root of 2421205979 is about 49205.7514829313. The cubic root of 2421205979 is about 1342.7976707354.

The spelling of 2421205979 in words is "two billion, four hundred twenty-one million, two hundred five thousand, nine hundred seventy-nine".