1020708109 has 2 divisors, whose sum is σ = 1020708110. Its totient is φ = 1020708108.

The previous prime is 1020708089. The next prime is 1020708127. The reversal of 1020708109 is 9018070201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 956355625 + 64352484 = 30925^2 + 8022^2 .

It is a cyclic number.

It is not a de Polignac number, because 1020708109 - 2¹⁷ = 1020577037 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1020708149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510354054 + 510354055.

It is an arithmetic number, because the mean of its divisors is an integer number (510354055).

Almost surely, 2^1020708109 is an apocalyptic number.

It is an amenable number.

1020708109 is a deficient number, since it is larger than the sum of its proper divisors (1).

1020708109 is an equidigital number, since it uses as much as digits as its factorization.

1020708109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1008, while the sum is 28.

The square root of 1020708109 is about 31948.5227984018. The cubic root of 1020708109 is about 1006.8555963955.

The spelling of 1020708109 in words is "one billion, twenty million, seven hundred eight thousand, one hundred nine".