9773813 has 4 divisors (see below), whose sum is σ = 11170080. Its totient is φ = 8377548.

The previous prime is 9773767. The next prime is 9773821. The reversal of 9773813 is 3183779.

It is a happy number.

9773813 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.

It is a cyclic number.

It is not a de Polignac number, because 9773813 - 2⁶ = 9773749 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 (9773833) 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, 698123 + ... + 698136.

It is an arithmetic number, because the mean of its divisors is an integer number (2792520).

Almost surely, 2^9773813 is an apocalyptic number.

It is an amenable number.

9773813 is a deficient number, since it is larger than the sum of its proper divisors (1396267).

9773813 is a wasteful number, since it uses less digits than its factorization.

9773813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1396266.

The product of its digits is 31752, while the sum is 38.

The square root of 9773813 is about 3126.3098055055. The cubic root of 9773813 is about 213.8067154540.

The spelling of 9773813 in words is "nine million, seven hundred seventy-three thousand, eight hundred thirteen".