521237089 has 4 divisors (see below), whose sum is σ = 548670640. Its totient is φ = 493803540.

The previous prime is 521237053. The next prime is 521237113. The reversal of 521237089 is 980732125.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 521237089 - 2⁹ = 521236577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (521237029) 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, 13716747 + ... + 13716784.

It is an arithmetic number, because the mean of its divisors is an integer number (137167660).

Almost surely, 2^521237089 is an apocalyptic number.

It is an amenable number.

521237089 is a deficient number, since it is larger than the sum of its proper divisors (27433551).

521237089 is a wasteful number, since it uses less digits than its factorization.

521237089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27433550.

The product of its (nonzero) digits is 30240, while the sum is 37.

The square root of 521237089 is about 22830.6173591517. The cubic root of 521237089 is about 804.7823384365.

The spelling of 521237089 in words is "five hundred twenty-one million, two hundred thirty-seven thousand, eighty-nine".