920799817 has 12 divisors (see below), whose sum is σ = 1071975060. Its totient is φ = 788637696.

The previous prime is 920799811. The next prime is 920799937. The reversal of 920799817 is 718997029.

It can be written as a sum of positive squares in 2 ways, for example, as 99920016 + 820879801 = 9996^2 + 28651^2 .

It is not a de Polignac number, because 920799817 - 2¹⁹ = 920275529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (920799811) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 62373 + ... + 75709.

It is an arithmetic number, because the mean of its divisors is an integer number (89331255).

Almost surely, 2^920799817 is an apocalyptic number.

It is an amenable number.

920799817 is a deficient number, since it is larger than the sum of its proper divisors (151175243).

920799817 is a wasteful number, since it uses less digits than its factorization.

920799817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14760 (or 14753 counting only the distinct ones).

The product of its (nonzero) digits is 571536, while the sum is 52.

The square root of 920799817 is about 30344.6835046932. The cubic root of 920799817 is about 972.8705899005.

The spelling of 920799817 in words is "nine hundred twenty million, seven hundred ninety-nine thousand, eight hundred seventeen".