522520989 has 4 divisors (see below), whose sum is σ = 696694656. Its totient is φ = 348347324.

The previous prime is 522520987. The next prime is 522520991. The reversal of 522520989 is 989025225.

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 an interprime number because it is at equal distance from previous prime (522520987) and next prime (522520991).

It is a cyclic number.

It is not a de Polignac number, because 522520989 - 2¹ = 522520987 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 522520989.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (522520987) 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, 87086829 + ... + 87086834.

It is an arithmetic number, because the mean of its divisors is an integer number (174173664).

Almost surely, 2^522520989 is an apocalyptic number.

It is an amenable number.

522520989 is a deficient number, since it is larger than the sum of its proper divisors (174173667).

522520989 is a wasteful number, since it uses less digits than its factorization.

522520989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174173666.

The product of its (nonzero) digits is 129600, while the sum is 42.

The square root of 522520989 is about 22858.7180086723. The cubic root of 522520989 is about 805.4425708318.

The spelling of 522520989 in words is "five hundred twenty-two million, five hundred twenty thousand, nine hundred eighty-nine".