1320012979 has 2 divisors, whose sum is σ = 1320012980. Its totient is φ = 1320012978.

The previous prime is 1320012971. The next prime is 1320012989. The reversal of 1320012979 is 9792100231.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1320012979 - 2³ = 1320012971 is a prime.

It is not a weakly prime, because it can be changed into another prime (1320012971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660006489 + 660006490.

It is an arithmetic number, because the mean of its divisors is an integer number (660006490).

Almost surely, 2^1320012979 is an apocalyptic number.

1320012979 is a deficient number, since it is larger than the sum of its proper divisors (1).

1320012979 is an equidigital number, since it uses as much as digits as its factorization.

1320012979 is an evil number, because the sum of its binary digits is even.

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

The square root of 1320012979 is about 36331.9828663397. The cubic root of 1320012979 is about 1096.9649057931.

The spelling of 1320012979 in words is "one billion, three hundred twenty million, twelve thousand, nine hundred seventy-nine".