1020720079 has 2 divisors, whose sum is σ = 1020720080. Its totient is φ = 1020720078.

The previous prime is 1020720061. The next prime is 1020720083. The reversal of 1020720079 is 9700270201.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (9700270201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1020720079 - 2¹¹ = 1020718031 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1020720049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510360039 + 510360040.

It is an arithmetic number, because the mean of its divisors is an integer number (510360040).

Almost surely, 2^1020720079 is an apocalyptic number.

1020720079 is a deficient number, since it is larger than the sum of its proper divisors (1).

1020720079 is an equidigital number, since it uses as much as digits as its factorization.

1020720079 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1764, while the sum is 28.

The square root of 1020720079 is about 31948.7101304575. The cubic root of 1020720079 is about 1006.8595322300.

The spelling of 1020720079 in words is "one billion, twenty million, seven hundred twenty thousand, seventy-nine".