528801109 has 4 divisors (see below), whose sum is σ = 547035660. Its totient is φ = 510566560.

The previous prime is 528801107. The next prime is 528801121. The reversal of 528801109 is 901108825.

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

It can be written as a sum of positive squares in 2 ways, for example, as 430355025 + 98446084 = 20745^2 + 9922^2 .

It is a cyclic number.

It is not a de Polignac number, because 528801109 - 2¹ = 528801107 is a prime.

It is a super-2 number, since 2×528801109² = 559261225759259762, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (528801101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9117232 + ... + 9117289.

It is an arithmetic number, because the mean of its divisors is an integer number (136758915).

Almost surely, 2^528801109 is an apocalyptic number.

It is an amenable number.

528801109 is a deficient number, since it is larger than the sum of its proper divisors (18234551).

528801109 is a wasteful number, since it uses less digits than its factorization.

528801109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18234550.

The product of its (nonzero) digits is 5760, while the sum is 34.

The square root of 528801109 is about 22995.6758761294. The cubic root of 528801109 is about 808.6565695002.

The spelling of 528801109 in words is "five hundred twenty-eight million, eight hundred one thousand, one hundred nine".