120009979 has 2 divisors, whose sum is σ = 120009980. Its totient is φ = 120009978.

The previous prime is 120009961. The next prime is 120009983. The reversal of 120009979 is 979900021.

It is a strong prime.

It is an emirp because it is prime and its reverse (979900021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 120009979 - 2¹¹ = 120007931 is a prime.

It is not a weakly prime, because it can be changed into another prime (120009179) 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, 60004989 + 60004990.

It is an arithmetic number, because the mean of its divisors is an integer number (60004990).

Almost surely, 2^120009979 is an apocalyptic number.

120009979 is a deficient number, since it is larger than the sum of its proper divisors (1).

120009979 is an equidigital number, since it uses as much as digits as its factorization.

120009979 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10206, while the sum is 37.

The square root of 120009979 is about 10954.9066175847. The cubic root of 120009979 is about 493.2560868928.

The spelling of 120009979 in words is "one hundred twenty million, nine thousand, nine hundred seventy-nine".