9170768813 has 4 divisors (see below), whose sum is σ = 9710225820. Its totient is φ = 8631311808.

The previous prime is 9170768807. The next prime is 9170768821. The reversal of 9170768813 is 3188670719.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6959230084 + 2211538729 = 83422^2 + 47027^2 .

It is not a de Polignac number, because 9170768813 - 2¹² = 9170764717 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9170768833) 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, 269728478 + ... + 269728511.

It is an arithmetic number, because the mean of its divisors is an integer number (2427556455).

Almost surely, 2^9170768813 is an apocalyptic number.

It is an amenable number.

9170768813 is a deficient number, since it is larger than the sum of its proper divisors (539457007).

9170768813 is a wasteful number, since it uses less digits than its factorization.

9170768813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 539457006.

The product of its (nonzero) digits is 508032, while the sum is 50.

The square root of 9170768813 is about 95764.1311400046. The cubic root of 9170768813 is about 2093.1575337483.

The spelling of 9170768813 in words is "nine billion, one hundred seventy million, seven hundred sixty-eight thousand, eight hundred thirteen".