3120021979 has 2 divisors, whose sum is σ = 3120021980. Its totient is φ = 3120021978.

The previous prime is 3120021973. The next prime is 3120021997. The reversal of 3120021979 is 9791200213.

It is a happy number.

Together with next prime (3120021997) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3120021979 - 2²⁵ = 3086467547 is a prime.

It is not a weakly prime, because it can be changed into another prime (3120021973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1560010989 + 1560010990.

It is an arithmetic number, because the mean of its divisors is an integer number (1560010990).

Almost surely, 2^3120021979 is an apocalyptic number.

3120021979 is a deficient number, since it is larger than the sum of its proper divisors (1).

3120021979 is an equidigital number, since it uses as much as digits as its factorization.

3120021979 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6804, while the sum is 34.

The square root of 3120021979 is about 55857.1569183395. The cubic root of 3120021979 is about 1461.2321460380.

The spelling of 3120021979 in words is "three billion, one hundred twenty million, twenty-one thousand, nine hundred seventy-nine".