9447813 has 8 divisors (see below), whose sum is σ = 13996800. Its totient is φ = 6298524.

The previous prime is 9447811. The next prime is 9447821. The reversal of 9447813 is 3187449.

It is a happy number.

It is not a de Polignac number, because 9447813 - 2¹ = 9447811 is a prime.

It is a super-2 number, since 2×9447813² = 178522340965938, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9447811) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 174933 + ... + 174986.

It is an arithmetic number, because the mean of its divisors is an integer number (1749600).

Almost surely, 2^9447813 is an apocalyptic number.

It is an amenable number.

9447813 is a deficient number, since it is larger than the sum of its proper divisors (4548987).

9447813 is a wasteful number, since it uses less digits than its factorization.

9447813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 349928 (or 349922 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 9447813 is about 3073.7294936282. The cubic root of 9447813 is about 211.4026512408.

It can be divided in two parts, 944781 and 3, that added together give a square (944784 = 972²).

The spelling of 9447813 in words is "nine million, four hundred forty-seven thousand, eight hundred thirteen".