906520561 has 4 divisors (see below), whose sum is σ = 906592752. Its totient is φ = 906448372.

The previous prime is 906520501. The next prime is 906520567. The reversal of 906520561 is 165025609.

It is a happy number.

906520561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 165025609 = 7 ⋅23575087.

It is a cyclic number.

It is not a de Polignac number, because 906520561 - 2⁹ = 906520049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (906520567) 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, 11815 + ... + 44188.

It is an arithmetic number, because the mean of its divisors is an integer number (226648188).

Almost surely, 2^906520561 is an apocalyptic number.

It is an amenable number.

906520561 is a deficient number, since it is larger than the sum of its proper divisors (72191).

906520561 is a wasteful number, since it uses less digits than its factorization.

906520561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72190.

The product of its (nonzero) digits is 16200, while the sum is 34.

The square root of 906520561 is about 30108.4798852416. The cubic root of 906520561 is about 967.8154547820.

The spelling of 906520561 in words is "nine hundred six million, five hundred twenty thousand, five hundred sixty-one".