916520945 has 4 divisors (see below), whose sum is σ = 1099825140. Its totient is φ = 733216752.

The previous prime is 916520923. The next prime is 916520947. The reversal of 916520945 is 549025619.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 549025619 = 2707 ⋅202817.

It can be written as a sum of positive squares in 2 ways, for example, as 662341696 + 254179249 = 25736^2 + 15943^2 .

It is a cyclic number.

It is not a de Polignac number, because 916520945 - 2¹⁰ = 916519921 is a prime.

It is not an unprimeable number, because it can be changed into a prime (916520947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 91652090 + ... + 91652099.

It is an arithmetic number, because the mean of its divisors is an integer number (274956285).

Almost surely, 2^916520945 is an apocalyptic number.

It is an amenable number.

916520945 is a deficient number, since it is larger than the sum of its proper divisors (183304195).

916520945 is a wasteful number, since it uses less digits than its factorization.

916520945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183304194.

The product of its (nonzero) digits is 97200, while the sum is 41.

The square root of 916520945 is about 30274.0969312051. The cubic root of 916520945 is about 971.3613029452.

The spelling of 916520945 in words is "nine hundred sixteen million, five hundred twenty thousand, nine hundred forty-five".