1020708091 has 4 divisors (see below), whose sum is σ = 1099224112. Its totient is φ = 942192072.

The previous prime is 1020708089. The next prime is 1020708109. The reversal of 1020708091 is 1908070201.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1020708091 - 2¹ = 1020708089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1020708001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39257991 + ... + 39258016.

It is an arithmetic number, because the mean of its divisors is an integer number (274806028).

Almost surely, 2^1020708091 is an apocalyptic number.

1020708091 is a deficient number, since it is larger than the sum of its proper divisors (78516021).

1020708091 is an equidigital number, since it uses as much as digits as its factorization.

1020708091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78516020.

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

The square root of 1020708091 is about 31948.5225166986. The cubic root of 1020708091 is about 1006.8555904770.

Adding to 1020708091 its reverse (1908070201), we get a palindrome (2928778292).

The spelling of 1020708091 in words is "one billion, twenty million, seven hundred eight thousand, ninety-one".