521457089 has 4 divisors (see below), whose sum is σ = 531295956. Its totient is φ = 511618224.

The previous prime is 521457067. The next prime is 521457113. The reversal of 521457089 is 980754125.

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 295255489 + 226201600 = 17183^2 + 15040^2 .

It is a cyclic number.

It is not a de Polignac number, because 521457089 - 2²⁰ = 520408513 is a prime.

It is not an unprimeable number, because it can be changed into a prime (521457019) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4919354 + ... + 4919459.

It is an arithmetic number, because the mean of its divisors is an integer number (132823989).

Almost surely, 2^521457089 is an apocalyptic number.

It is an amenable number.

521457089 is a deficient number, since it is larger than the sum of its proper divisors (9838867).

521457089 is an equidigital number, since it uses as much as digits as its factorization.

521457089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9838866.

The product of its (nonzero) digits is 100800, while the sum is 41.

The square root of 521457089 is about 22835.4349422121. The cubic root of 521457089 is about 804.8955480900.

The spelling of 521457089 in words is "five hundred twenty-one million, four hundred fifty-seven thousand, eighty-nine".