9947297233 has 4 divisors (see below), whose sum is σ = 10019905380. Its totient is φ = 9874689088.

The previous prime is 9947297219. The next prime is 9947297237. The reversal of 9947297233 is 3327927499.

It is a happy number.

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 6857827344 + 3089469889 = 82812^2 + 55583^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9947297233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9947297237) 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, 36303868 + ... + 36304141.

It is an arithmetic number, because the mean of its divisors is an integer number (2504976345).

Almost surely, 2^9947297233 is an apocalyptic number.

It is an amenable number.

9947297233 is a deficient number, since it is larger than the sum of its proper divisors (72608147).

9947297233 is a wasteful number, since it uses less digits than its factorization.

9947297233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72608146.

The product of its digits is 5143824, while the sum is 55.

The square root of 9947297233 is about 99736.1380493550. The cubic root of 9947297233 is about 2150.6431991589.

The spelling of 9947297233 in words is "nine billion, nine hundred forty-seven million, two hundred ninety-seven thousand, two hundred thirty-three".