9221947 has 18 divisors (see below), whose sum is σ = 11096988. Its totient is φ = 7639632.

The previous prime is 9221941. The next prime is 9221951. The reversal of 9221947 is 7491229.

It is a happy number.

It is not a de Polignac number, because 9221947 - 2⁷ = 9221819 is a prime.

It is not an unprimeable number, because it can be changed into a prime (9221941) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 137608 + ... + 137674.

Almost surely, 2^9221947 is an apocalyptic number.

9221947 is a deficient number, since it is larger than the sum of its proper divisors (1875041).

9221947 is an equidigital number, since it uses as much as digits as its factorization.

9221947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187 (or 127 counting only the distinct ones).

The product of its digits is 9072, while the sum is 34.

The square root of 9221947 is about 3036.7658783647. The cubic root of 9221947 is about 209.7043989148.

The spelling of 9221947 in words is "nine million, two hundred twenty-one thousand, nine hundred forty-seven".